fs/cifs/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <[email protected]>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include "cifsfs.h"
  17 #include "cifsglob.h"
  18 #include "smb2pdu.h"
  19 #include "smb2proto.h"
  20 #include "cifsproto.h"
  21 #include "cifs_debug.h"
  22 #include "cifs_unicode.h"
  23 #include "smb2status.h"
  24 #include "smb2glob.h"
  25 #include "cifs_ioctl.h"
  26 #include "smbdirect.h"
  27 #include "fs_context.h"
  28
  29 /* Change credits for different ops and return the total number of credits */
  30 static int
  31 change_conf(struct TCP_Server_Info *server)
  32 {
  33         server->credits += server->echo_credits + server->oplock_credits;
  34         server->oplock_credits = server->echo_credits = 0;
  35         switch (server->credits) {
  36         case 0:
  37                 return 0;
  38         case 1:
  39                 server->echoes = false;
  40                 server->oplocks = false;
  41                 break;
  42         case 2:
  43                 server->echoes = true;
  44                 server->oplocks = false;
  45                 server->echo_credits = 1;
  46                 break;
  47         default:
  48                 server->echoes = true;
  49                 if (enable_oplocks) {
  50                         server->oplocks = true;
  51                         server->oplock_credits = 1;
  52                 } else
  53                         server->oplocks = false;
  54
  55                 server->echo_credits = 1;
  56         }
  57         server->credits -= server->echo_credits + server->oplock_credits;
  58         return server->credits + server->echo_credits + server->oplock_credits;
  59 }
  60
  61 static void
  62 smb2_add_credits(struct TCP_Server_Info *server,
  63                  const struct cifs_credits *credits, const int optype)
  64 {
  65         int *val, rc = -1;
  66         int scredits, in_flight;
  67         unsigned int add = credits->value;
  68         unsigned int instance = credits->instance;
  69         bool reconnect_detected = false;
  70         bool reconnect_with_invalid_credits = false;
  71
  72         spin_lock(&server->req_lock);
  73         val = server->ops->get_credits_field(server, optype);
  74
  75         /* eg found case where write overlapping reconnect messed up credits */
  76         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  77                 reconnect_with_invalid_credits = true;
  78
  79         if ((instance == 0) || (instance == server->reconnect_instance))
  80                 *val += add;
  81         else
  82                 reconnect_detected = true;
  83
  84         if (*val > 65000) {
  85                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  86                 pr_warn_once("server overflowed SMB3 credits\n");
  87         }
  88         server->in_flight--;
  89         if (server->in_flight == 0 &&
  90            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
  91            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
  92                 rc = change_conf(server);
  93         /*
  94          * Sometimes server returns 0 credits on oplock break ack - we need to
  95          * rebalance credits in this case.
  96          */
  97         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  98                  server->oplocks) {
  99                 if (server->credits > 1) {
 100                         server->credits--;
 101                         server->oplock_credits++;
 102                 }
 103         }
 104         scredits = *val;
 105         in_flight = server->in_flight;
 106         spin_unlock(&server->req_lock);
 107         wake_up(&server->request_q);
 108
 109         if (reconnect_detected) {
 110                 trace_smb3_reconnect_detected(server->CurrentMid,
 111                         server->conn_id, server->hostname, scredits, add, in_flight);
 112
 113                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 114                          add, instance);
 115         }
 116
 117         if (reconnect_with_invalid_credits) {
 118                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 119                         server->conn_id, server->hostname, scredits, add, in_flight);
 120                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 121                          optype, scredits, add);
 122         }
 123
 124         if (server->tcpStatus == CifsNeedReconnect
 125             || server->tcpStatus == CifsExiting)
 126                 return;
 127
 128         switch (rc) {
 129         case -1:
 130                 /* change_conf hasn't been executed */
 131                 break;
 132         case 0:
 133                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 134                 break;
 135         case 1:
 136                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 137                 break;
 138         case 2:
 139                 cifs_dbg(FYI, "disabling oplocks\n");
 140                 break;
 141         default:
 142                 /* change_conf rebalanced credits for different types */
 143                 break;
 144         }
 145
 146         trace_smb3_add_credits(server->CurrentMid,
 147                         server->conn_id, server->hostname, scredits, add, in_flight);
 148         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 149 }
 150
 151 static void
 152 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 153 {
 154         int scredits, in_flight;
 155
 156         spin_lock(&server->req_lock);
 157         server->credits = val;
 158         if (val == 1)
 159                 server->reconnect_instance++;
 160         scredits = server->credits;
 161         in_flight = server->in_flight;
 162         spin_unlock(&server->req_lock);
 163
 164         trace_smb3_set_credits(server->CurrentMid,
 165                         server->conn_id, server->hostname, scredits, val, in_flight);
 166         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 167
 168         /* don't log while holding the lock */
 169         if (val == 1)
 170                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 171 }
 172
 173 static int *
 174 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 175 {
 176         switch (optype) {
 177         case CIFS_ECHO_OP:
 178                 return &server->echo_credits;
 179         case CIFS_OBREAK_OP:
 180                 return &server->oplock_credits;
 181         default:
 182                 return &server->credits;
 183         }
 184 }
 185
 186 static unsigned int
 187 smb2_get_credits(struct mid_q_entry *mid)
 188 {
 189         return mid->credits_received;
 190 }
 191
 192 static int
 193 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 194                       unsigned int *num, struct cifs_credits *credits)
 195 {
 196         int rc = 0;
 197         unsigned int scredits, in_flight;
 198
 199         spin_lock(&server->req_lock);
 200         while (1) {
 201                 if (server->credits <= 0) {
 202                         spin_unlock(&server->req_lock);
 203                         cifs_num_waiters_inc(server);
 204                         rc = wait_event_killable(server->request_q,
 205                                 has_credits(server, &server->credits, 1));
 206                         cifs_num_waiters_dec(server);
 207                         if (rc)
 208                                 return rc;
 209                         spin_lock(&server->req_lock);
 210                 } else {
 211                         if (server->tcpStatus == CifsExiting) {
 212                                 spin_unlock(&server->req_lock);
 213                                 return -ENOENT;
 214                         }
 215
 216                         scredits = server->credits;
 217                         /* can deadlock with reopen */
 218                         if (scredits <= 8) {
 219                                 *num = SMB2_MAX_BUFFER_SIZE;
 220                                 credits->value = 0;
 221                                 credits->instance = 0;
 222                                 break;
 223                         }
 224
 225                         /* leave some credits for reopen and other ops */
 226                         scredits -= 8;
 227                         *num = min_t(unsigned int, size,
 228                                      scredits * SMB2_MAX_BUFFER_SIZE);
 229
 230                         credits->value =
 231                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 232                         credits->instance = server->reconnect_instance;
 233                         server->credits -= credits->value;
 234                         server->in_flight++;
 235                         if (server->in_flight > server->max_in_flight)
 236                                 server->max_in_flight = server->in_flight;
 237                         break;
 238                 }
 239         }
 240         scredits = server->credits;
 241         in_flight = server->in_flight;
 242         spin_unlock(&server->req_lock);
 243
 244         trace_smb3_add_credits(server->CurrentMid,
 245                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 246         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 247                         __func__, credits->value, scredits);
 248
 249         return rc;
 250 }
 251
 252 static int
 253 smb2_adjust_credits(struct TCP_Server_Info *server,
 254                     struct cifs_credits *credits,
 255                     const unsigned int payload_size)
 256 {
 257         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 258         int scredits, in_flight;
 259
 260         if (!credits->value || credits->value == new_val)
 261                 return 0;
 262
 263         if (credits->value < new_val) {
 264                 trace_smb3_too_many_credits(server->CurrentMid,
 265                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 266                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 267                                 credits->value, new_val);
 268
 269                 return -ENOTSUPP;
 270         }
 271
 272         spin_lock(&server->req_lock);
 273
 274         if (server->reconnect_instance != credits->instance) {
 275                 scredits = server->credits;
 276                 in_flight = server->in_flight;
 277                 spin_unlock(&server->req_lock);
 278
 279                 trace_smb3_reconnect_detected(server->CurrentMid,
 280                         server->conn_id, server->hostname, scredits,
 281                         credits->value - new_val, in_flight);
 282                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 283                          credits->value - new_val);
 284                 return -EAGAIN;
 285         }
 286
 287         server->credits += credits->value - new_val;
 288         scredits = server->credits;
 289         in_flight = server->in_flight;
 290         spin_unlock(&server->req_lock);
 291         wake_up(&server->request_q);
 292
 293         trace_smb3_add_credits(server->CurrentMid,
 294                         server->conn_id, server->hostname, scredits,
 295                         credits->value - new_val, in_flight);
 296         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 297                         __func__, credits->value - new_val, scredits);
 298
 299         credits->value = new_val;
 300
 301         return 0;
 302 }
 303
 304 static __u64
 305 smb2_get_next_mid(struct TCP_Server_Info *server)
 306 {
 307         __u64 mid;
 308         /* for SMB2 we need the current value */
 309         spin_lock(&GlobalMid_Lock);
 310         mid = server->CurrentMid++;
 311         spin_unlock(&GlobalMid_Lock);
 312         return mid;
 313 }
 314
 315 static void
 316 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 317 {
 318         spin_lock(&GlobalMid_Lock);
 319         if (server->CurrentMid >= val)
 320                 server->CurrentMid -= val;
 321         spin_unlock(&GlobalMid_Lock);
 322 }
 323
 324 static struct mid_q_entry *
 325 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 326 {
 327         struct mid_q_entry *mid;
 328         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 329         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 330
 331         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 332                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 333                 return NULL;
 334         }
 335
 336         spin_lock(&GlobalMid_Lock);
 337         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 338                 if ((mid->mid == wire_mid) &&
 339                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 340                     (mid->command == shdr->Command)) {
 341                         kref_get(&mid->refcount);
 342                         if (dequeue) {
 343                                 list_del_init(&mid->qhead);
 344                                 mid->mid_flags |= MID_DELETED;
 345                         }
 346                         spin_unlock(&GlobalMid_Lock);
 347                         return mid;
 348                 }
 349         }
 350         spin_unlock(&GlobalMid_Lock);
 351         return NULL;
 352 }
 353
 354 static struct mid_q_entry *
 355 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 356 {
 357         return __smb2_find_mid(server, buf, false);
 358 }
 359
 360 static struct mid_q_entry *
 361 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 362 {
 363         return __smb2_find_mid(server, buf, true);
 364 }
 365
 366 static void
 367 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 368 {
 369 #ifdef CONFIG_CIFS_DEBUG2
 370         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 371
 372         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 373                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 374                  shdr->ProcessId);
 375         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 376                  server->ops->calc_smb_size(buf, server));
 377 #endif
 378 }
 379
 380 static bool
 381 smb2_need_neg(struct TCP_Server_Info *server)
 382 {
 383         return server->max_read == 0;
 384 }
 385
 386 static int
 387 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 388 {
 389         int rc;
 390
 391         spin_lock(&GlobalMid_Lock);
 392         cifs_ses_server(ses)->CurrentMid = 0;
 393         spin_unlock(&GlobalMid_Lock);
 394         rc = SMB2_negotiate(xid, ses);
 395         /* BB we probably don't need to retry with modern servers */
 396         if (rc == -EAGAIN)
 397                 rc = -EHOSTDOWN;
 398         return rc;
 399 }
 400
 401 static unsigned int
 402 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 403 {
 404         struct TCP_Server_Info *server = tcon->ses->server;
 405         unsigned int wsize;
 406
 407         /* start with specified wsize, or default */
 408         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 409         wsize = min_t(unsigned int, wsize, server->max_write);
 410         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 411                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 412
 413         return wsize;
 414 }
 415
 416 static unsigned int
 417 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 418 {
 419         struct TCP_Server_Info *server = tcon->ses->server;
 420         unsigned int wsize;
 421
 422         /* start with specified wsize, or default */
 423         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 424         wsize = min_t(unsigned int, wsize, server->max_write);
 425 #ifdef CONFIG_CIFS_SMB_DIRECT
 426         if (server->rdma) {
 427                 if (server->sign)
 428                         /*
 429                          * Account for SMB2 data transfer packet header and
 430                          * possible encryption header
 431                          */
 432                         wsize = min_t(unsigned int,
 433                                 wsize,
 434                                 server->smbd_conn->max_fragmented_send_size -
 435                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 436                                         sizeof(struct smb2_transform_hdr));
 437                 else
 438                         wsize = min_t(unsigned int,
 439                                 wsize, server->smbd_conn->max_readwrite_size);
 440         }
 441 #endif
 442         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 443                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 444
 445         return wsize;
 446 }
 447
 448 static unsigned int
 449 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 450 {
 451         struct TCP_Server_Info *server = tcon->ses->server;
 452         unsigned int rsize;
 453
 454         /* start with specified rsize, or default */
 455         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 456         rsize = min_t(unsigned int, rsize, server->max_read);
 457
 458         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 459                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 460
 461         return rsize;
 462 }
 463
 464 static unsigned int
 465 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 466 {
 467         struct TCP_Server_Info *server = tcon->ses->server;
 468         unsigned int rsize;
 469
 470         /* start with specified rsize, or default */
 471         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 472         rsize = min_t(unsigned int, rsize, server->max_read);
 473 #ifdef CONFIG_CIFS_SMB_DIRECT
 474         if (server->rdma) {
 475                 if (server->sign)
 476                         /*
 477                          * Account for SMB2 data transfer packet header and
 478                          * possible encryption header
 479                          */
 480                         rsize = min_t(unsigned int,
 481                                 rsize,
 482                                 server->smbd_conn->max_fragmented_recv_size -
 483                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 484                                         sizeof(struct smb2_transform_hdr));
 485                 else
 486                         rsize = min_t(unsigned int,
 487                                 rsize, server->smbd_conn->max_readwrite_size);
 488         }
 489 #endif
 490
 491         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 492                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 493
 494         return rsize;
 495 }
 496
 497 static int
 498 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 499                         size_t buf_len,
 500                         struct cifs_server_iface **iface_list,
 501                         size_t *iface_count)
 502 {
 503         struct network_interface_info_ioctl_rsp *p;
 504         struct sockaddr_in *addr4;
 505         struct sockaddr_in6 *addr6;
 506         struct iface_info_ipv4 *p4;
 507         struct iface_info_ipv6 *p6;
 508         struct cifs_server_iface *info;
 509         ssize_t bytes_left;
 510         size_t next = 0;
 511         int nb_iface = 0;
 512         int rc = 0;
 513
 514         *iface_list = NULL;
 515         *iface_count = 0;
 516
 517         /*
 518          * Fist pass: count and sanity check
 519          */
 520
 521         bytes_left = buf_len;
 522         p = buf;
 523         while (bytes_left >= sizeof(*p)) {
 524                 nb_iface++;
 525                 next = le32_to_cpu(p->Next);
 526                 if (!next) {
 527                         bytes_left -= sizeof(*p);
 528                         break;
 529                 }
 530                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 531                 bytes_left -= next;
 532         }
 533
 534         if (!nb_iface) {
 535                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 536                 rc = -EINVAL;
 537                 goto out;
 538         }
 539
 540         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 541         if ((bytes_left > 8) || p->Next)
 542                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 543
 544
 545         /*
 546          * Second pass: extract info to internal structure
 547          */
 548
 549         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 550         if (!*iface_list) {
 551                 rc = -ENOMEM;
 552                 goto out;
 553         }
 554
 555         info = *iface_list;
 556         bytes_left = buf_len;
 557         p = buf;
 558         while (bytes_left >= sizeof(*p)) {
 559                 info->speed = le64_to_cpu(p->LinkSpeed);
 560                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 561                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 562
 563                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 564                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 565                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 566                          le32_to_cpu(p->Capability));
 567
 568                 switch (p->Family) {
 569                 /*
 570                  * The kernel and wire socket structures have the same
 571                  * layout and use network byte order but make the
 572                  * conversion explicit in case either one changes.
 573                  */
 574                 case INTERNETWORK:
 575                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 576                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 577                         addr4->sin_family = AF_INET;
 578                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 579
 580                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 581                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 582
 583                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 584                                  &addr4->sin_addr);
 585                         break;
 586                 case INTERNETWORKV6:
 587                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 588                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 589                         addr6->sin6_family = AF_INET6;
 590                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 591
 592                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 593                         addr6->sin6_flowinfo = 0;
 594                         addr6->sin6_scope_id = 0;
 595                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 596
 597                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 598                                  &addr6->sin6_addr);
 599                         break;
 600                 default:
 601                         cifs_dbg(VFS,
 602                                  "%s: skipping unsupported socket family\n",
 603                                  __func__);
 604                         goto next_iface;
 605                 }
 606
 607                 (*iface_count)++;
 608                 info++;
 609 next_iface:
 610                 next = le32_to_cpu(p->Next);
 611                 if (!next)
 612                         break;
 613                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 614                 bytes_left -= next;
 615         }
 616
 617         if (!*iface_count) {
 618                 rc = -EINVAL;
 619                 goto out;
 620         }
 621
 622 out:
 623         if (rc) {
 624                 kfree(*iface_list);
 625                 *iface_count = 0;
 626                 *iface_list = NULL;
 627         }
 628         return rc;
 629 }
 630
 631 static int compare_iface(const void *ia, const void *ib)
 632 {
 633         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 634         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 635
 636         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 637 }
 638
 639 static int
 640 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 641 {
 642         int rc;
 643         unsigned int ret_data_len = 0;
 644         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 645         struct cifs_server_iface *iface_list;
 646         size_t iface_count;
 647         struct cifs_ses *ses = tcon->ses;
 648
 649         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 650                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 651                         NULL /* no data input */, 0 /* no data input */,
 652                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 653         if (rc == -EOPNOTSUPP) {
 654                 cifs_dbg(FYI,
 655                          "server does not support query network interfaces\n");
 656                 goto out;
 657         } else if (rc != 0) {
 658                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 659                 goto out;
 660         }
 661
 662         rc = parse_server_interfaces(out_buf, ret_data_len,
 663                                      &iface_list, &iface_count);
 664         if (rc)
 665                 goto out;
 666
 667         /* sort interfaces from fastest to slowest */
 668         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 669
 670         spin_lock(&ses->iface_lock);
 671         kfree(ses->iface_list);
 672         ses->iface_list = iface_list;
 673         ses->iface_count = iface_count;
 674         ses->iface_last_update = jiffies;
 675         spin_unlock(&ses->iface_lock);
 676
 677 out:
 678         kfree(out_buf);
 679         return rc;
 680 }
 681
 682 static void
 683 smb2_close_cached_fid(struct kref *ref)
 684 {
 685         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 686                                                refcount);
 687
 688         if (cfid->is_valid) {
 689                 cifs_dbg(FYI, "clear cached root file handle\n");
 690                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 691                            cfid->fid->volatile_fid);
 692         }
 693
 694         /*
 695          * We only check validity above to send SMB2_close,
 696          * but we still need to invalidate these entries
 697          * when this function is called
 698          */
 699         cfid->is_valid = false;
 700         cfid->file_all_info_is_valid = false;
 701         cfid->has_lease = false;
 702         if (cfid->dentry) {
 703                 dput(cfid->dentry);
 704                 cfid->dentry = NULL;
 705         }
 706 }
 707
 708 void close_cached_dir(struct cached_fid *cfid)
 709 {
 710         mutex_lock(&cfid->fid_mutex);
 711         kref_put(&cfid->refcount, smb2_close_cached_fid);
 712         mutex_unlock(&cfid->fid_mutex);
 713 }
 714
 715 void close_cached_dir_lease_locked(struct cached_fid *cfid)
 716 {
 717         if (cfid->has_lease) {
 718                 cfid->has_lease = false;
 719                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 720         }
 721 }
 722
 723 void close_cached_dir_lease(struct cached_fid *cfid)
 724 {
 725         mutex_lock(&cfid->fid_mutex);
 726         close_cached_dir_lease_locked(cfid);
 727         mutex_unlock(&cfid->fid_mutex);
 728 }
 729
 730 void
 731 smb2_cached_lease_break(struct work_struct *work)
 732 {
 733         struct cached_fid *cfid = container_of(work,
 734                                 struct cached_fid, lease_break);
 735
 736         close_cached_dir_lease(cfid);
 737 }
 738
 739 /*
 740  * Open the and cache a directory handle.
 741  * Only supported for the root handle.
 742  */
 743 int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
 744                 const char *path,
 745                 struct cifs_sb_info *cifs_sb,
 746                 struct cached_fid **cfid)
 747 {
 748         struct cifs_ses *ses = tcon->ses;
 749         struct TCP_Server_Info *server = ses->server;
 750         struct cifs_open_parms oparms;
 751         struct smb2_create_rsp *o_rsp = NULL;
 752         struct smb2_query_info_rsp *qi_rsp = NULL;
 753         int resp_buftype[2];
 754         struct smb_rqst rqst[2];
 755         struct kvec rsp_iov[2];
 756         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 757         struct kvec qi_iov[1];
 758         int rc, flags = 0;
 759         __le16 utf16_path = 0; /* Null - since an open of top of share */
 760         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 761         struct cifs_fid *pfid;
 762         struct dentry *dentry;
 763
 764         if (tcon->nohandlecache)
 765                 return -ENOTSUPP;
 766
 767         if (cifs_sb->root == NULL)
 768                 return -ENOENT;
 769
 770         if (strlen(path))
 771                 return -ENOENT;
 772
 773         dentry = cifs_sb->root;
 774
 775         mutex_lock(&tcon->crfid.fid_mutex);
 776         if (tcon->crfid.is_valid) {
 777                 cifs_dbg(FYI, "found a cached root file handle\n");
 778                 *cfid = &tcon->crfid;
 779                 kref_get(&tcon->crfid.refcount);
 780                 mutex_unlock(&tcon->crfid.fid_mutex);
 781                 return 0;
 782         }
 783
 784         /*
 785          * We do not hold the lock for the open because in case
 786          * SMB2_open needs to reconnect, it will end up calling
 787          * cifs_mark_open_files_invalid() which takes the lock again
 788          * thus causing a deadlock
 789          */
 790
 791         mutex_unlock(&tcon->crfid.fid_mutex);
 792
 793         if (smb3_encryption_required(tcon))
 794                 flags |= CIFS_TRANSFORM_REQ;
 795
 796         if (!server->ops->new_lease_key)
 797                 return -EIO;
 798
 799         pfid = tcon->crfid.fid;
 800         server->ops->new_lease_key(pfid);
 801
 802         memset(rqst, 0, sizeof(rqst));
 803         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 804         memset(rsp_iov, 0, sizeof(rsp_iov));
 805
 806         /* Open */
 807         memset(&open_iov, 0, sizeof(open_iov));
 808         rqst[0].rq_iov = open_iov;
 809         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 810
 811         oparms.tcon = tcon;
 812         oparms.create_options = cifs_create_options(cifs_sb, 0);
 813         oparms.desired_access = FILE_READ_ATTRIBUTES;
 814         oparms.disposition = FILE_OPEN;
 815         oparms.fid = pfid;
 816         oparms.reconnect = false;
 817
 818         rc = SMB2_open_init(tcon, server,
 819                             &rqst[0], &oplock, &oparms, &utf16_path);
 820         if (rc)
 821                 goto oshr_free;
 822         smb2_set_next_command(tcon, &rqst[0]);
 823
 824         memset(&qi_iov, 0, sizeof(qi_iov));
 825         rqst[1].rq_iov = qi_iov;
 826         rqst[1].rq_nvec = 1;
 827
 828         rc = SMB2_query_info_init(tcon, server,
 829                                   &rqst[1], COMPOUND_FID,
 830                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 831                                   SMB2_O_INFO_FILE, 0,
 832                                   sizeof(struct smb2_file_all_info) +
 833                                   PATH_MAX * 2, 0, NULL);
 834         if (rc)
 835                 goto oshr_free;
 836
 837         smb2_set_related(&rqst[1]);
 838
 839         rc = compound_send_recv(xid, ses, server,
 840                                 flags, 2, rqst,
 841                                 resp_buftype, rsp_iov);
 842         mutex_lock(&tcon->crfid.fid_mutex);
 843
 844         /*
 845          * Now we need to check again as the cached root might have
 846          * been successfully re-opened from a concurrent process
 847          */
 848
 849         if (tcon->crfid.is_valid) {
 850                 /* work was already done */
 851
 852                 /* stash fids for close() later */
 853                 struct cifs_fid fid = {
 854                         .persistent_fid = pfid->persistent_fid,
 855                         .volatile_fid = pfid->volatile_fid,
 856                 };
 857
 858                 /*
 859                  * caller expects this func to set the fid in crfid to valid
 860                  * cached root, so increment the refcount.
 861                  */
 862                 kref_get(&tcon->crfid.refcount);
 863
 864                 mutex_unlock(&tcon->crfid.fid_mutex);
 865
 866                 if (rc == 0) {
 867                         /* close extra handle outside of crit sec */
 868                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 869                 }
 870                 rc = 0;
 871                 goto oshr_free;
 872         }
 873
 874         /* Cached root is still invalid, continue normaly */
 875
 876         if (rc) {
 877                 if (rc == -EREMCHG) {
 878                         tcon->need_reconnect = true;
 879                         pr_warn_once("server share %s deleted\n",
 880                                      tcon->treeName);
 881                 }
 882                 goto oshr_exit;
 883         }
 884
 885         atomic_inc(&tcon->num_remote_opens);
 886
 887         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 888         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 889         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 890 #ifdef CONFIG_CIFS_DEBUG2
 891         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 892 #endif /* CIFS_DEBUG2 */
 893
 894         tcon->crfid.tcon = tcon;
 895         tcon->crfid.is_valid = true;
 896         tcon->crfid.dentry = dentry;
 897         dget(dentry);
 898         kref_init(&tcon->crfid.refcount);
 899
 900         /* BB TBD check to see if oplock level check can be removed below */
 901         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 902                 /*
 903                  * See commit 2f94a3125b87. Increment the refcount when we
 904                  * get a lease for root, release it if lease break occurs
 905                  */
 906                 kref_get(&tcon->crfid.refcount);
 907                 tcon->crfid.has_lease = true;
 908                 smb2_parse_contexts(server, o_rsp,
 909                                 &oparms.fid->epoch,
 910                                     oparms.fid->lease_key, &oplock,
 911                                     NULL, NULL);
 912         } else
 913                 goto oshr_exit;
 914
 915         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 916         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 917                 goto oshr_exit;
 918         if (!smb2_validate_and_copy_iov(
 919                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 920                                 sizeof(struct smb2_file_all_info),
 921                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 922                                 (char *)&tcon->crfid.file_all_info))
 923                 tcon->crfid.file_all_info_is_valid = true;
 924         tcon->crfid.time = jiffies;
 925
 926
 927 oshr_exit:
 928         mutex_unlock(&tcon->crfid.fid_mutex);
 929 oshr_free:
 930         SMB2_open_free(&rqst[0]);
 931         SMB2_query_info_free(&rqst[1]);
 932         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 933         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 934         if (rc == 0)
 935                 *cfid = &tcon->crfid;
 936         return rc;
 937 }
 938
 939 int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
 940                               struct dentry *dentry,
 941                               struct cached_fid **cfid)
 942 {
 943         mutex_lock(&tcon->crfid.fid_mutex);
 944         if (tcon->crfid.dentry == dentry) {
 945                 cifs_dbg(FYI, "found a cached root file handle by dentry\n");
 946                 *cfid = &tcon->crfid;
 947                 kref_get(&tcon->crfid.refcount);
 948                 mutex_unlock(&tcon->crfid.fid_mutex);
 949                 return 0;
 950         }
 951         mutex_unlock(&tcon->crfid.fid_mutex);
 952         return -ENOENT;
 953 }
 954
 955 static void
 956 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 957               struct cifs_sb_info *cifs_sb)
 958 {
 959         int rc;
 960         __le16 srch_path = 0; /* Null - open root of share */
 961         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 962         struct cifs_open_parms oparms;
 963         struct cifs_fid fid;
 964         struct cached_fid *cfid = NULL;
 965
 966         oparms.tcon = tcon;
 967         oparms.desired_access = FILE_READ_ATTRIBUTES;
 968         oparms.disposition = FILE_OPEN;
 969         oparms.create_options = cifs_create_options(cifs_sb, 0);
 970         oparms.fid = &fid;
 971         oparms.reconnect = false;
 972
 973         rc = open_cached_dir(xid, tcon, "", cifs_sb, &cfid);
 974         if (rc == 0)
 975                 memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
 976         else
 977                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 978                                NULL, NULL);
 979         if (rc)
 980                 return;
 981
 982         SMB3_request_interfaces(xid, tcon);
 983
 984         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 985                         FS_ATTRIBUTE_INFORMATION);
 986         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 987                         FS_DEVICE_INFORMATION);
 988         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 989                         FS_VOLUME_INFORMATION);
 990         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 991                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 992         if (cfid == NULL)
 993                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 994         else
 995                 close_cached_dir(cfid);
 996 }
 997
 998 static void
 999 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
1000               struct cifs_sb_info *cifs_sb)
1001 {
1002         int rc;
1003         __le16 srch_path = 0; /* Null - open root of share */
1004         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1005         struct cifs_open_parms oparms;
1006         struct cifs_fid fid;
1007
1008         oparms.tcon = tcon;
1009         oparms.desired_access = FILE_READ_ATTRIBUTES;
1010         oparms.disposition = FILE_OPEN;
1011         oparms.create_options = cifs_create_options(cifs_sb, 0);
1012         oparms.fid = &fid;
1013         oparms.reconnect = false;
1014
1015         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
1016                        NULL, NULL);
1017         if (rc)
1018                 return;
1019
1020         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1021                         FS_ATTRIBUTE_INFORMATION);
1022         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1023                         FS_DEVICE_INFORMATION);
1024         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1025 }
1026
1027 static int
1028 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
1029                         struct cifs_sb_info *cifs_sb, const char *full_path)
1030 {
1031         int rc;
1032         __le16 *utf16_path;
1033         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1034         struct cifs_open_parms oparms;
1035         struct cifs_fid fid;
1036
1037         if ((*full_path == 0) && tcon->crfid.is_valid)
1038                 return 0;
1039
1040         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1041         if (!utf16_path)
1042                 return -ENOMEM;
1043
1044         oparms.tcon = tcon;
1045         oparms.desired_access = FILE_READ_ATTRIBUTES;
1046         oparms.disposition = FILE_OPEN;
1047         oparms.create_options = cifs_create_options(cifs_sb, 0);
1048         oparms.fid = &fid;
1049         oparms.reconnect = false;
1050
1051         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
1052                        NULL);
1053         if (rc) {
1054                 kfree(utf16_path);
1055                 return rc;
1056         }
1057
1058         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1059         kfree(utf16_path);
1060         return rc;
1061 }
1062
1063 static int
1064 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
1065                   struct cifs_sb_info *cifs_sb, const char *full_path,
1066                   u64 *uniqueid, FILE_ALL_INFO *data)
1067 {
1068         *uniqueid = le64_to_cpu(data->IndexNumber);
1069         return 0;
1070 }
1071
1072 static int
1073 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
1074                      struct cifs_fid *fid, FILE_ALL_INFO *data)
1075 {
1076         int rc;
1077         struct smb2_file_all_info *smb2_data;
1078
1079         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1080                             GFP_KERNEL);
1081         if (smb2_data == NULL)
1082                 return -ENOMEM;
1083
1084         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
1085                              smb2_data);
1086         if (!rc)
1087                 move_smb2_info_to_cifs(data, smb2_data);
1088         kfree(smb2_data);
1089         return rc;
1090 }
1091
1092 #ifdef CONFIG_CIFS_XATTR
1093 static ssize_t
1094 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
1095                      struct smb2_file_full_ea_info *src, size_t src_size,
1096                      const unsigned char *ea_name)
1097 {
1098         int rc = 0;
1099         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
1100         char *name, *value;
1101         size_t buf_size = dst_size;
1102         size_t name_len, value_len, user_name_len;
1103
1104         while (src_size > 0) {
1105                 name = &src->ea_data[0];
1106                 name_len = (size_t)src->ea_name_length;
1107                 value = &src->ea_data[src->ea_name_length + 1];
1108                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1109
1110                 if (name_len == 0)
1111                         break;
1112
1113                 if (src_size < 8 + name_len + 1 + value_len) {
1114                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1115                         rc = -EIO;
1116                         goto out;
1117                 }
1118
1119                 if (ea_name) {
1120                         if (ea_name_len == name_len &&
1121                             memcmp(ea_name, name, name_len) == 0) {
1122                                 rc = value_len;
1123                                 if (dst_size == 0)
1124                                         goto out;
1125                                 if (dst_size < value_len) {
1126                                         rc = -ERANGE;
1127                                         goto out;
1128                                 }
1129                                 memcpy(dst, value, value_len);
1130                                 goto out;
1131                         }
1132                 } else {
1133                         /* 'user.' plus a terminating null */
1134                         user_name_len = 5 + 1 + name_len;
1135
1136                         if (buf_size == 0) {
1137                                 /* skip copy - calc size only */
1138                                 rc += user_name_len;
1139                         } else if (dst_size >= user_name_len) {
1140                                 dst_size -= user_name_len;
1141                                 memcpy(dst, "user.", 5);
1142                                 dst += 5;
1143                                 memcpy(dst, src->ea_data, name_len);
1144                                 dst += name_len;
1145                                 *dst = 0;
1146                                 ++dst;
1147                                 rc += user_name_len;
1148                         } else {
1149                                 /* stop before overrun buffer */
1150                                 rc = -ERANGE;
1151                                 break;
1152                         }
1153                 }
1154
1155                 if (!src->next_entry_offset)
1156                         break;
1157
1158                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1159                         /* stop before overrun buffer */
1160                         rc = -ERANGE;
1161                         break;
1162                 }
1163                 src_size -= le32_to_cpu(src->next_entry_offset);
1164                 src = (void *)((char *)src +
1165                                le32_to_cpu(src->next_entry_offset));
1166         }
1167
1168         /* didn't find the named attribute */
1169         if (ea_name)
1170                 rc = -ENODATA;
1171
1172 out:
1173         return (ssize_t)rc;
1174 }
1175
1176 static ssize_t
1177 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1178                const unsigned char *path, const unsigned char *ea_name,
1179                char *ea_data, size_t buf_size,
1180                struct cifs_sb_info *cifs_sb)
1181 {
1182         int rc;
1183         __le16 *utf16_path;
1184         struct kvec rsp_iov = {NULL, 0};
1185         int buftype = CIFS_NO_BUFFER;
1186         struct smb2_query_info_rsp *rsp;
1187         struct smb2_file_full_ea_info *info = NULL;
1188
1189         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1190         if (!utf16_path)
1191                 return -ENOMEM;
1192
1193         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1194                                       FILE_READ_EA,
1195                                       FILE_FULL_EA_INFORMATION,
1196                                       SMB2_O_INFO_FILE,
1197                                       CIFSMaxBufSize -
1198                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1199                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1200                                       &rsp_iov, &buftype, cifs_sb);
1201         if (rc) {
1202                 /*
1203                  * If ea_name is NULL (listxattr) and there are no EAs,
1204                  * return 0 as it's not an error. Otherwise, the specified
1205                  * ea_name was not found.
1206                  */
1207                 if (!ea_name && rc == -ENODATA)
1208                         rc = 0;
1209                 goto qeas_exit;
1210         }
1211
1212         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1213         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1214                                le32_to_cpu(rsp->OutputBufferLength),
1215                                &rsp_iov,
1216                                sizeof(struct smb2_file_full_ea_info));
1217         if (rc)
1218                 goto qeas_exit;
1219
1220         info = (struct smb2_file_full_ea_info *)(
1221                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1222         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1223                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1224
1225  qeas_exit:
1226         kfree(utf16_path);
1227         free_rsp_buf(buftype, rsp_iov.iov_base);
1228         return rc;
1229 }
1230
1231
1232 static int
1233 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1234             const char *path, const char *ea_name, const void *ea_value,
1235             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1236             struct cifs_sb_info *cifs_sb)
1237 {
1238         struct cifs_ses *ses = tcon->ses;
1239         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1240         __le16 *utf16_path = NULL;
1241         int ea_name_len = strlen(ea_name);
1242         int flags = CIFS_CP_CREATE_CLOSE_OP;
1243         int len;
1244         struct smb_rqst rqst[3];
1245         int resp_buftype[3];
1246         struct kvec rsp_iov[3];
1247         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1248         struct cifs_open_parms oparms;
1249         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1250         struct cifs_fid fid;
1251         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1252         unsigned int size[1];
1253         void *data[1];
1254         struct smb2_file_full_ea_info *ea = NULL;
1255         struct kvec close_iov[1];
1256         struct smb2_query_info_rsp *rsp;
1257         int rc, used_len = 0;
1258
1259         if (smb3_encryption_required(tcon))
1260                 flags |= CIFS_TRANSFORM_REQ;
1261
1262         if (ea_name_len > 255)
1263                 return -EINVAL;
1264
1265         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1266         if (!utf16_path)
1267                 return -ENOMEM;
1268
1269         memset(rqst, 0, sizeof(rqst));
1270         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1271         memset(rsp_iov, 0, sizeof(rsp_iov));
1272
1273         if (ses->server->ops->query_all_EAs) {
1274                 if (!ea_value) {
1275                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1276                                                              ea_name, NULL, 0,
1277                                                              cifs_sb);
1278                         if (rc == -ENODATA)
1279                                 goto sea_exit;
1280                 } else {
1281                         /* If we are adding a attribute we should first check
1282                          * if there will be enough space available to store
1283                          * the new EA. If not we should not add it since we
1284                          * would not be able to even read the EAs back.
1285                          */
1286                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1287                                       FILE_READ_EA,
1288                                       FILE_FULL_EA_INFORMATION,
1289                                       SMB2_O_INFO_FILE,
1290                                       CIFSMaxBufSize -
1291                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1292                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1293                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1294                         if (rc == 0) {
1295                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1296                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1297                         }
1298                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1299                         resp_buftype[1] = CIFS_NO_BUFFER;
1300                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1301                         rc = 0;
1302
1303                         /* Use a fudge factor of 256 bytes in case we collide
1304                          * with a different set_EAs command.
1305                          */
1306                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1307                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1308                            used_len + ea_name_len + ea_value_len + 1) {
1309                                 rc = -ENOSPC;
1310                                 goto sea_exit;
1311                         }
1312                 }
1313         }
1314
1315         /* Open */
1316         memset(&open_iov, 0, sizeof(open_iov));
1317         rqst[0].rq_iov = open_iov;
1318         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1319
1320         memset(&oparms, 0, sizeof(oparms));
1321         oparms.tcon = tcon;
1322         oparms.desired_access = FILE_WRITE_EA;
1323         oparms.disposition = FILE_OPEN;
1324         oparms.create_options = cifs_create_options(cifs_sb, 0);
1325         oparms.fid = &fid;
1326         oparms.reconnect = false;
1327
1328         rc = SMB2_open_init(tcon, server,
1329                             &rqst[0], &oplock, &oparms, utf16_path);
1330         if (rc)
1331                 goto sea_exit;
1332         smb2_set_next_command(tcon, &rqst[0]);
1333
1334
1335         /* Set Info */
1336         memset(&si_iov, 0, sizeof(si_iov));
1337         rqst[1].rq_iov = si_iov;
1338         rqst[1].rq_nvec = 1;
1339
1340         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1341         ea = kzalloc(len, GFP_KERNEL);
1342         if (ea == NULL) {
1343                 rc = -ENOMEM;
1344                 goto sea_exit;
1345         }
1346
1347         ea->ea_name_length = ea_name_len;
1348         ea->ea_value_length = cpu_to_le16(ea_value_len);
1349         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1350         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1351
1352         size[0] = len;
1353         data[0] = ea;
1354
1355         rc = SMB2_set_info_init(tcon, server,
1356                                 &rqst[1], COMPOUND_FID,
1357                                 COMPOUND_FID, current->tgid,
1358                                 FILE_FULL_EA_INFORMATION,
1359                                 SMB2_O_INFO_FILE, 0, data, size);
1360         smb2_set_next_command(tcon, &rqst[1]);
1361         smb2_set_related(&rqst[1]);
1362
1363
1364         /* Close */
1365         memset(&close_iov, 0, sizeof(close_iov));
1366         rqst[2].rq_iov = close_iov;
1367         rqst[2].rq_nvec = 1;
1368         rc = SMB2_close_init(tcon, server,
1369                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1370         smb2_set_related(&rqst[2]);
1371
1372         rc = compound_send_recv(xid, ses, server,
1373                                 flags, 3, rqst,
1374                                 resp_buftype, rsp_iov);
1375         /* no need to bump num_remote_opens because handle immediately closed */
1376
1377  sea_exit:
1378         kfree(ea);
1379         kfree(utf16_path);
1380         SMB2_open_free(&rqst[0]);
1381         SMB2_set_info_free(&rqst[1]);
1382         SMB2_close_free(&rqst[2]);
1383         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1384         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1385         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1386         return rc;
1387 }
1388 #endif
1389
1390 static bool
1391 smb2_can_echo(struct TCP_Server_Info *server)
1392 {
1393         return server->echoes;
1394 }
1395
1396 static void
1397 smb2_clear_stats(struct cifs_tcon *tcon)
1398 {
1399         int i;
1400
1401         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1402                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1403                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1404         }
1405 }
1406
1407 static void
1408 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1409 {
1410         seq_puts(m, "\n\tShare Capabilities:");
1411         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1412                 seq_puts(m, " DFS,");
1413         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1414                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1415         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1416                 seq_puts(m, " SCALEOUT,");
1417         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1418                 seq_puts(m, " CLUSTER,");
1419         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1420                 seq_puts(m, " ASYMMETRIC,");
1421         if (tcon->capabilities == 0)
1422                 seq_puts(m, " None");
1423         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1424                 seq_puts(m, " Aligned,");
1425         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1426                 seq_puts(m, " Partition Aligned,");
1427         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1428                 seq_puts(m, " SSD,");
1429         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1430                 seq_puts(m, " TRIM-support,");
1431
1432         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1433         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1434         if (tcon->perf_sector_size)
1435                 seq_printf(m, "\tOptimal sector size: 0x%x",
1436                            tcon->perf_sector_size);
1437         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1438 }
1439
1440 static void
1441 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1442 {
1443         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1444         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1445
1446         /*
1447          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1448          *  totals (requests sent) since those SMBs are per-session not per tcon
1449          */
1450         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1451                    (long long)(tcon->bytes_read),
1452                    (long long)(tcon->bytes_written));
1453         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1454                    atomic_read(&tcon->num_local_opens),
1455                    atomic_read(&tcon->num_remote_opens));
1456         seq_printf(m, "\nTreeConnects: %d total %d failed",
1457                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1458                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1459         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1460                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1461                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1462         seq_printf(m, "\nCreates: %d total %d failed",
1463                    atomic_read(&sent[SMB2_CREATE_HE]),
1464                    atomic_read(&failed[SMB2_CREATE_HE]));
1465         seq_printf(m, "\nCloses: %d total %d failed",
1466                    atomic_read(&sent[SMB2_CLOSE_HE]),
1467                    atomic_read(&failed[SMB2_CLOSE_HE]));
1468         seq_printf(m, "\nFlushes: %d total %d failed",
1469                    atomic_read(&sent[SMB2_FLUSH_HE]),
1470                    atomic_read(&failed[SMB2_FLUSH_HE]));
1471         seq_printf(m, "\nReads: %d total %d failed",
1472                    atomic_read(&sent[SMB2_READ_HE]),
1473                    atomic_read(&failed[SMB2_READ_HE]));
1474         seq_printf(m, "\nWrites: %d total %d failed",
1475                    atomic_read(&sent[SMB2_WRITE_HE]),
1476                    atomic_read(&failed[SMB2_WRITE_HE]));
1477         seq_printf(m, "\nLocks: %d total %d failed",
1478                    atomic_read(&sent[SMB2_LOCK_HE]),
1479                    atomic_read(&failed[SMB2_LOCK_HE]));
1480         seq_printf(m, "\nIOCTLs: %d total %d failed",
1481                    atomic_read(&sent[SMB2_IOCTL_HE]),
1482                    atomic_read(&failed[SMB2_IOCTL_HE]));
1483         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1484                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1485                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1486         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1487                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1488                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1489         seq_printf(m, "\nQueryInfos: %d total %d failed",
1490                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1491                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1492         seq_printf(m, "\nSetInfos: %d total %d failed",
1493                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1494                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1495         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1496                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1497                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1498 }
1499
1500 static void
1501 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1502 {
1503         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1504         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1505
1506         cfile->fid.persistent_fid = fid->persistent_fid;
1507         cfile->fid.volatile_fid = fid->volatile_fid;
1508         cfile->fid.access = fid->access;
1509 #ifdef CONFIG_CIFS_DEBUG2
1510         cfile->fid.mid = fid->mid;
1511 #endif /* CIFS_DEBUG2 */
1512         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1513                                       &fid->purge_cache);
1514         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1515         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1516 }
1517
1518 static void
1519 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1520                 struct cifs_fid *fid)
1521 {
1522         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1523 }
1524
1525 static void
1526 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1527                    struct cifsFileInfo *cfile)
1528 {
1529         struct smb2_file_network_open_info file_inf;
1530         struct inode *inode;
1531         int rc;
1532
1533         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1534                    cfile->fid.volatile_fid, &file_inf);
1535         if (rc)
1536                 return;
1537
1538         inode = d_inode(cfile->dentry);
1539
1540         spin_lock(&inode->i_lock);
1541         CIFS_I(inode)->time = jiffies;
1542
1543         /* Creation time should not need to be updated on close */
1544         if (file_inf.LastWriteTime)
1545                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1546         if (file_inf.ChangeTime)
1547                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1548         if (file_inf.LastAccessTime)
1549                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1550
1551         /*
1552          * i_blocks is not related to (i_size / i_blksize),
1553          * but instead 512 byte (2**9) size is required for
1554          * calculating num blocks.
1555          */
1556         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1557                 inode->i_blocks =
1558                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1559
1560         /* End of file and Attributes should not have to be updated on close */
1561         spin_unlock(&inode->i_lock);
1562 }
1563
1564 static int
1565 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1566                      u64 persistent_fid, u64 volatile_fid,
1567                      struct copychunk_ioctl *pcchunk)
1568 {
1569         int rc;
1570         unsigned int ret_data_len;
1571         struct resume_key_req *res_key;
1572
1573         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1574                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1575                         NULL, 0 /* no input */, CIFSMaxBufSize,
1576                         (char **)&res_key, &ret_data_len);
1577
1578         if (rc == -EOPNOTSUPP) {
1579                 pr_warn_once("Server share %s does not support copy range\n", tcon->treeName);
1580                 goto req_res_key_exit;
1581         } else if (rc) {
1582                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1583                 goto req_res_key_exit;
1584         }
1585         if (ret_data_len < sizeof(struct resume_key_req)) {
1586                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1587                 rc = -EINVAL;
1588                 goto req_res_key_exit;
1589         }
1590         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1591
1592 req_res_key_exit:
1593         kfree(res_key);
1594         return rc;
1595 }
1596
1597 struct iqi_vars {
1598         struct smb_rqst rqst[3];
1599         struct kvec rsp_iov[3];
1600         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1601         struct kvec qi_iov[1];
1602         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1603         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1604         struct kvec close_iov[1];
1605 };
1606
1607 static int
1608 smb2_ioctl_query_info(const unsigned int xid,
1609                       struct cifs_tcon *tcon,
1610                       struct cifs_sb_info *cifs_sb,
1611                       __le16 *path, int is_dir,
1612                       unsigned long p)
1613 {
1614         struct iqi_vars *vars;
1615         struct smb_rqst *rqst;
1616         struct kvec *rsp_iov;
1617         struct cifs_ses *ses = tcon->ses;
1618         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1619         char __user *arg = (char __user *)p;
1620         struct smb_query_info qi;
1621         struct smb_query_info __user *pqi;
1622         int rc = 0;
1623         int flags = CIFS_CP_CREATE_CLOSE_OP;
1624         struct smb2_query_info_rsp *qi_rsp = NULL;
1625         struct smb2_ioctl_rsp *io_rsp = NULL;
1626         void *buffer = NULL;
1627         int resp_buftype[3];
1628         struct cifs_open_parms oparms;
1629         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1630         struct cifs_fid fid;
1631         unsigned int size[2];
1632         void *data[2];
1633         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1634
1635         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1636         if (vars == NULL)
1637                 return -ENOMEM;
1638         rqst = &vars->rqst[0];
1639         rsp_iov = &vars->rsp_iov[0];
1640
1641         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1642
1643         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1644                 goto e_fault;
1645
1646         if (qi.output_buffer_length > 1024) {
1647                 kfree(vars);
1648                 return -EINVAL;
1649         }
1650
1651         if (!ses || !server) {
1652                 kfree(vars);
1653                 return -EIO;
1654         }
1655
1656         if (smb3_encryption_required(tcon))
1657                 flags |= CIFS_TRANSFORM_REQ;
1658
1659         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1660                              qi.output_buffer_length);
1661         if (IS_ERR(buffer)) {
1662                 kfree(vars);
1663                 return PTR_ERR(buffer);
1664         }
1665
1666         /* Open */
1667         rqst[0].rq_iov = &vars->open_iov[0];
1668         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1669
1670         memset(&oparms, 0, sizeof(oparms));
1671         oparms.tcon = tcon;
1672         oparms.disposition = FILE_OPEN;
1673         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1674         oparms.fid = &fid;
1675         oparms.reconnect = false;
1676
1677         if (qi.flags & PASSTHRU_FSCTL) {
1678                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1679                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1680                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1681                         break;
1682                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1683                         oparms.desired_access = GENERIC_ALL;
1684                         break;
1685                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1686                         oparms.desired_access = GENERIC_READ;
1687                         break;
1688                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1689                         oparms.desired_access = GENERIC_WRITE;
1690                         break;
1691                 }
1692         } else if (qi.flags & PASSTHRU_SET_INFO) {
1693                 oparms.desired_access = GENERIC_WRITE;
1694         } else {
1695                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1696         }
1697
1698         rc = SMB2_open_init(tcon, server,
1699                             &rqst[0], &oplock, &oparms, path);
1700         if (rc)
1701                 goto iqinf_exit;
1702         smb2_set_next_command(tcon, &rqst[0]);
1703
1704         /* Query */
1705         if (qi.flags & PASSTHRU_FSCTL) {
1706                 /* Can eventually relax perm check since server enforces too */
1707                 if (!capable(CAP_SYS_ADMIN))
1708                         rc = -EPERM;
1709                 else  {
1710                         rqst[1].rq_iov = &vars->io_iov[0];
1711                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1712
1713                         rc = SMB2_ioctl_init(tcon, server,
1714                                              &rqst[1],
1715                                              COMPOUND_FID, COMPOUND_FID,
1716                                              qi.info_type, true, buffer,
1717                                              qi.output_buffer_length,
1718                                              CIFSMaxBufSize -
1719                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1720                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1721                 }
1722         } else if (qi.flags == PASSTHRU_SET_INFO) {
1723                 /* Can eventually relax perm check since server enforces too */
1724                 if (!capable(CAP_SYS_ADMIN))
1725                         rc = -EPERM;
1726                 else  {
1727                         rqst[1].rq_iov = &vars->si_iov[0];
1728                         rqst[1].rq_nvec = 1;
1729
1730                         size[0] = 8;
1731                         data[0] = buffer;
1732
1733                         rc = SMB2_set_info_init(tcon, server,
1734                                         &rqst[1],
1735                                         COMPOUND_FID, COMPOUND_FID,
1736                                         current->tgid,
1737                                         FILE_END_OF_FILE_INFORMATION,
1738                                         SMB2_O_INFO_FILE, 0, data, size);
1739                 }
1740         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1741                 rqst[1].rq_iov = &vars->qi_iov[0];
1742                 rqst[1].rq_nvec = 1;
1743
1744                 rc = SMB2_query_info_init(tcon, server,
1745                                   &rqst[1], COMPOUND_FID,
1746                                   COMPOUND_FID, qi.file_info_class,
1747                                   qi.info_type, qi.additional_information,
1748                                   qi.input_buffer_length,
1749                                   qi.output_buffer_length, buffer);
1750         } else { /* unknown flags */
1751                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1752                               qi.flags);
1753                 rc = -EINVAL;
1754         }
1755
1756         if (rc)
1757                 goto iqinf_exit;
1758         smb2_set_next_command(tcon, &rqst[1]);
1759         smb2_set_related(&rqst[1]);
1760
1761         /* Close */
1762         rqst[2].rq_iov = &vars->close_iov[0];
1763         rqst[2].rq_nvec = 1;
1764
1765         rc = SMB2_close_init(tcon, server,
1766                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1767         if (rc)
1768                 goto iqinf_exit;
1769         smb2_set_related(&rqst[2]);
1770
1771         rc = compound_send_recv(xid, ses, server,
1772                                 flags, 3, rqst,
1773                                 resp_buftype, rsp_iov);
1774         if (rc)
1775                 goto iqinf_exit;
1776
1777         /* No need to bump num_remote_opens since handle immediately closed */
1778         if (qi.flags & PASSTHRU_FSCTL) {
1779                 pqi = (struct smb_query_info __user *)arg;
1780                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1781                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1782                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1783                 if (qi.input_buffer_length > 0 &&
1784                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1785                     > rsp_iov[1].iov_len)
1786                         goto e_fault;
1787
1788                 if (copy_to_user(&pqi->input_buffer_length,
1789                                  &qi.input_buffer_length,
1790                                  sizeof(qi.input_buffer_length)))
1791                         goto e_fault;
1792
1793                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1794                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1795                                  qi.input_buffer_length))
1796                         goto e_fault;
1797         } else {
1798                 pqi = (struct smb_query_info __user *)arg;
1799                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1800                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1801                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1802                 if (copy_to_user(&pqi->input_buffer_length,
1803                                  &qi.input_buffer_length,
1804                                  sizeof(qi.input_buffer_length)))
1805                         goto e_fault;
1806
1807                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1808                                  qi.input_buffer_length))
1809                         goto e_fault;
1810         }
1811
1812  iqinf_exit:
1813         cifs_small_buf_release(rqst[0].rq_iov[0].iov_base);
1814         cifs_small_buf_release(rqst[1].rq_iov[0].iov_base);
1815         cifs_small_buf_release(rqst[2].rq_iov[0].iov_base);
1816         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1817         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1818         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1819         kfree(vars);
1820         kfree(buffer);
1821         return rc;
1822
1823 e_fault:
1824         rc = -EFAULT;
1825         goto iqinf_exit;
1826 }
1827
1828 static ssize_t
1829 smb2_copychunk_range(const unsigned int xid,
1830                         struct cifsFileInfo *srcfile,
1831                         struct cifsFileInfo *trgtfile, u64 src_off,
1832                         u64 len, u64 dest_off)
1833 {
1834         int rc;
1835         unsigned int ret_data_len;
1836         struct copychunk_ioctl *pcchunk;
1837         struct copychunk_ioctl_rsp *retbuf = NULL;
1838         struct cifs_tcon *tcon;
1839         int chunks_copied = 0;
1840         bool chunk_sizes_updated = false;
1841         ssize_t bytes_written, total_bytes_written = 0;
1842
1843         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1844
1845         if (pcchunk == NULL)
1846                 return -ENOMEM;
1847
1848         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1849         /* Request a key from the server to identify the source of the copy */
1850         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1851                                 srcfile->fid.persistent_fid,
1852                                 srcfile->fid.volatile_fid, pcchunk);
1853
1854         /* Note: request_res_key sets res_key null only if rc !=0 */
1855         if (rc)
1856                 goto cchunk_out;
1857
1858         /* For now array only one chunk long, will make more flexible later */
1859         pcchunk->ChunkCount = cpu_to_le32(1);
1860         pcchunk->Reserved = 0;
1861         pcchunk->Reserved2 = 0;
1862
1863         tcon = tlink_tcon(trgtfile->tlink);
1864
1865         while (len > 0) {
1866                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1867                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1868                 pcchunk->Length =
1869                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1870
1871                 /* Request server copy to target from src identified by key */
1872                 kfree(retbuf);
1873                 retbuf = NULL;
1874                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1875                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1876                         true /* is_fsctl */, (char *)pcchunk,
1877                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1878                         (char **)&retbuf, &ret_data_len);
1879                 if (rc == 0) {
1880                         if (ret_data_len !=
1881                                         sizeof(struct copychunk_ioctl_rsp)) {
1882                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1883                                 rc = -EIO;
1884                                 goto cchunk_out;
1885                         }
1886                         if (retbuf->TotalBytesWritten == 0) {
1887                                 cifs_dbg(FYI, "no bytes copied\n");
1888                                 rc = -EIO;
1889                                 goto cchunk_out;
1890                         }
1891                         /*
1892                          * Check if server claimed to write more than we asked
1893                          */
1894                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1895                             le32_to_cpu(pcchunk->Length)) {
1896                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1897                                 rc = -EIO;
1898                                 goto cchunk_out;
1899                         }
1900                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1901                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1902                                 rc = -EIO;
1903                                 goto cchunk_out;
1904                         }
1905                         chunks_copied++;
1906
1907                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1908                         src_off += bytes_written;
1909                         dest_off += bytes_written;
1910                         len -= bytes_written;
1911                         total_bytes_written += bytes_written;
1912
1913                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1914                                 le32_to_cpu(retbuf->ChunksWritten),
1915                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1916                                 bytes_written);
1917                 } else if (rc == -EINVAL) {
1918                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1919                                 goto cchunk_out;
1920
1921                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1922                                 le32_to_cpu(retbuf->ChunksWritten),
1923                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1924                                 le32_to_cpu(retbuf->TotalBytesWritten));
1925
1926                         /*
1927                          * Check if this is the first request using these sizes,
1928                          * (ie check if copy succeed once with original sizes
1929                          * and check if the server gave us different sizes after
1930                          * we already updated max sizes on previous request).
1931                          * if not then why is the server returning an error now
1932                          */
1933                         if ((chunks_copied != 0) || chunk_sizes_updated)
1934                                 goto cchunk_out;
1935
1936                         /* Check that server is not asking us to grow size */
1937                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1938                                         tcon->max_bytes_chunk)
1939                                 tcon->max_bytes_chunk =
1940                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1941                         else
1942                                 goto cchunk_out; /* server gave us bogus size */
1943
1944                         /* No need to change MaxChunks since already set to 1 */
1945                         chunk_sizes_updated = true;
1946                 } else
1947                         goto cchunk_out;
1948         }
1949
1950 cchunk_out:
1951         kfree(pcchunk);
1952         kfree(retbuf);
1953         if (rc)
1954                 return rc;
1955         else
1956                 return total_bytes_written;
1957 }
1958
1959 static int
1960 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1961                 struct cifs_fid *fid)
1962 {
1963         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1964 }
1965
1966 static unsigned int
1967 smb2_read_data_offset(char *buf)
1968 {
1969         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1970
1971         return rsp->DataOffset;
1972 }
1973
1974 static unsigned int
1975 smb2_read_data_length(char *buf, bool in_remaining)
1976 {
1977         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1978
1979         if (in_remaining)
1980                 return le32_to_cpu(rsp->DataRemaining);
1981
1982         return le32_to_cpu(rsp->DataLength);
1983 }
1984
1985
1986 static int
1987 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1988                struct cifs_io_parms *parms, unsigned int *bytes_read,
1989                char **buf, int *buf_type)
1990 {
1991         parms->persistent_fid = pfid->persistent_fid;
1992         parms->volatile_fid = pfid->volatile_fid;
1993         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1994 }
1995
1996 static int
1997 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1998                 struct cifs_io_parms *parms, unsigned int *written,
1999                 struct kvec *iov, unsigned long nr_segs)
2000 {
2001
2002         parms->persistent_fid = pfid->persistent_fid;
2003         parms->volatile_fid = pfid->volatile_fid;
2004         return SMB2_write(xid, parms, written, iov, nr_segs);
2005 }
2006
2007 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
2008 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
2009                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
2010 {
2011         struct cifsInodeInfo *cifsi;
2012         int rc;
2013
2014         cifsi = CIFS_I(inode);
2015
2016         /* if file already sparse don't bother setting sparse again */
2017         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
2018                 return true; /* already sparse */
2019
2020         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
2021                 return true; /* already not sparse */
2022
2023         /*
2024          * Can't check for sparse support on share the usual way via the
2025          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
2026          * since Samba server doesn't set the flag on the share, yet
2027          * supports the set sparse FSCTL and returns sparse correctly
2028          * in the file attributes. If we fail setting sparse though we
2029          * mark that server does not support sparse files for this share
2030          * to avoid repeatedly sending the unsupported fsctl to server
2031          * if the file is repeatedly extended.
2032          */
2033         if (tcon->broken_sparse_sup)
2034                 return false;
2035
2036         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2037                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
2038                         true /* is_fctl */,
2039                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
2040         if (rc) {
2041                 tcon->broken_sparse_sup = true;
2042                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
2043                 return false;
2044         }
2045
2046         if (setsparse)
2047                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
2048         else
2049                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
2050
2051         return true;
2052 }
2053
2054 static int
2055 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
2056                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
2057 {
2058         __le64 eof = cpu_to_le64(size);
2059         struct inode *inode;
2060
2061         /*
2062          * If extending file more than one page make sparse. Many Linux fs
2063          * make files sparse by default when extending via ftruncate
2064          */
2065         inode = d_inode(cfile->dentry);
2066
2067         if (!set_alloc && (size > inode->i_size + 8192)) {
2068                 __u8 set_sparse = 1;
2069
2070                 /* whether set sparse succeeds or not, extend the file */
2071                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
2072         }
2073
2074         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2075                             cfile->fid.volatile_fid, cfile->pid, &eof);
2076 }
2077
2078 static int
2079 smb2_duplicate_extents(const unsigned int xid,
2080                         struct cifsFileInfo *srcfile,
2081                         struct cifsFileInfo *trgtfile, u64 src_off,
2082                         u64 len, u64 dest_off)
2083 {
2084         int rc;
2085         unsigned int ret_data_len;
2086         struct inode *inode;
2087         struct duplicate_extents_to_file dup_ext_buf;
2088         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2089
2090         /* server fileays advertise duplicate extent support with this flag */
2091         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2092              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2093                 return -EOPNOTSUPP;
2094
2095         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2096         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2097         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2098         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2099         dup_ext_buf.ByteCount = cpu_to_le64(len);
2100         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2101                 src_off, dest_off, len);
2102
2103         inode = d_inode(trgtfile->dentry);
2104         if (inode->i_size < dest_off + len) {
2105                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2106                 if (rc)
2107                         goto duplicate_extents_out;
2108
2109                 /*
2110                  * Although also could set plausible allocation size (i_blocks)
2111                  * here in addition to setting the file size, in reflink
2112                  * it is likely that the target file is sparse. Its allocation
2113                  * size will be queried on next revalidate, but it is important
2114                  * to make sure that file's cached size is updated immediately
2115                  */
2116                 cifs_setsize(inode, dest_off + len);
2117         }
2118         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2119                         trgtfile->fid.volatile_fid,
2120                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2121                         true /* is_fsctl */,
2122                         (char *)&dup_ext_buf,
2123                         sizeof(struct duplicate_extents_to_file),
2124                         CIFSMaxBufSize, NULL,
2125                         &ret_data_len);
2126
2127         if (ret_data_len > 0)
2128                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2129
2130 duplicate_extents_out:
2131         return rc;
2132 }
2133
2134 static int
2135 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2136                    struct cifsFileInfo *cfile)
2137 {
2138         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2139                             cfile->fid.volatile_fid);
2140 }
2141
2142 static int
2143 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2144                    struct cifsFileInfo *cfile)
2145 {
2146         struct fsctl_set_integrity_information_req integr_info;
2147         unsigned int ret_data_len;
2148
2149         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2150         integr_info.Flags = 0;
2151         integr_info.Reserved = 0;
2152
2153         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2154                         cfile->fid.volatile_fid,
2155                         FSCTL_SET_INTEGRITY_INFORMATION,
2156                         true /* is_fsctl */,
2157                         (char *)&integr_info,
2158                         sizeof(struct fsctl_set_integrity_information_req),
2159                         CIFSMaxBufSize, NULL,
2160                         &ret_data_len);
2161
2162 }
2163
2164 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2165 #define GMT_TOKEN_SIZE 50
2166
2167 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2168
2169 /*
2170  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2171  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2172  */
2173 static int
2174 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2175                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2176 {
2177         char *retbuf = NULL;
2178         unsigned int ret_data_len = 0;
2179         int rc;
2180         u32 max_response_size;
2181         struct smb_snapshot_array snapshot_in;
2182
2183         /*
2184          * On the first query to enumerate the list of snapshots available
2185          * for this volume the buffer begins with 0 (number of snapshots
2186          * which can be returned is zero since at that point we do not know
2187          * how big the buffer needs to be). On the second query,
2188          * it (ret_data_len) is set to number of snapshots so we can
2189          * know to set the maximum response size larger (see below).
2190          */
2191         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2192                 return -EFAULT;
2193
2194         /*
2195          * Note that for snapshot queries that servers like Azure expect that
2196          * the first query be minimal size (and just used to get the number/size
2197          * of previous versions) so response size must be specified as EXACTLY
2198          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2199          * of eight bytes.
2200          */
2201         if (ret_data_len == 0)
2202                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2203         else
2204                 max_response_size = CIFSMaxBufSize;
2205
2206         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2207                         cfile->fid.volatile_fid,
2208                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2209                         true /* is_fsctl */,
2210                         NULL, 0 /* no input data */, max_response_size,
2211                         (char **)&retbuf,
2212                         &ret_data_len);
2213         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2214                         rc, ret_data_len);
2215         if (rc)
2216                 return rc;
2217
2218         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2219                 /* Fixup buffer */
2220                 if (copy_from_user(&snapshot_in, ioc_buf,
2221                     sizeof(struct smb_snapshot_array))) {
2222                         rc = -EFAULT;
2223                         kfree(retbuf);
2224                         return rc;
2225                 }
2226
2227                 /*
2228                  * Check for min size, ie not large enough to fit even one GMT
2229                  * token (snapshot).  On the first ioctl some users may pass in
2230                  * smaller size (or zero) to simply get the size of the array
2231                  * so the user space caller can allocate sufficient memory
2232                  * and retry the ioctl again with larger array size sufficient
2233                  * to hold all of the snapshot GMT tokens on the second try.
2234                  */
2235                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2236                         ret_data_len = sizeof(struct smb_snapshot_array);
2237
2238                 /*
2239                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2240                  * the snapshot array (of 50 byte GMT tokens) each
2241                  * representing an available previous version of the data
2242                  */
2243                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2244                                         sizeof(struct smb_snapshot_array)))
2245                         ret_data_len = snapshot_in.snapshot_array_size +
2246                                         sizeof(struct smb_snapshot_array);
2247
2248                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2249                         rc = -EFAULT;
2250         }
2251
2252         kfree(retbuf);
2253         return rc;
2254 }
2255
2256
2257
2258 static int
2259 smb3_notify(const unsigned int xid, struct file *pfile,
2260             void __user *ioc_buf)
2261 {
2262         struct smb3_notify notify;
2263         struct dentry *dentry = pfile->f_path.dentry;
2264         struct inode *inode = file_inode(pfile);
2265         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2266         struct cifs_open_parms oparms;
2267         struct cifs_fid fid;
2268         struct cifs_tcon *tcon;
2269         const unsigned char *path;
2270         void *page = alloc_dentry_path();
2271         __le16 *utf16_path = NULL;
2272         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2273         int rc = 0;
2274
2275         path = build_path_from_dentry(dentry, page);
2276         if (IS_ERR(path)) {
2277                 rc = PTR_ERR(path);
2278                 goto notify_exit;
2279         }
2280
2281         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2282         if (utf16_path == NULL) {
2283                 rc = -ENOMEM;
2284                 goto notify_exit;
2285         }
2286
2287         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2288                 rc = -EFAULT;
2289                 goto notify_exit;
2290         }
2291
2292         tcon = cifs_sb_master_tcon(cifs_sb);
2293         oparms.tcon = tcon;
2294         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2295         oparms.disposition = FILE_OPEN;
2296         oparms.create_options = cifs_create_options(cifs_sb, 0);
2297         oparms.fid = &fid;
2298         oparms.reconnect = false;
2299
2300         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2301                        NULL);
2302         if (rc)
2303                 goto notify_exit;
2304
2305         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2306                                 notify.watch_tree, notify.completion_filter);
2307
2308         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2309
2310         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2311
2312 notify_exit:
2313         free_dentry_path(page);
2314         kfree(utf16_path);
2315         return rc;
2316 }
2317
2318 static int
2319 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2320                      const char *path, struct cifs_sb_info *cifs_sb,
2321                      struct cifs_fid *fid, __u16 search_flags,
2322                      struct cifs_search_info *srch_inf)
2323 {
2324         __le16 *utf16_path;
2325         struct smb_rqst rqst[2];
2326         struct kvec rsp_iov[2];
2327         int resp_buftype[2];
2328         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2329         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2330         int rc, flags = 0;
2331         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2332         struct cifs_open_parms oparms;
2333         struct smb2_query_directory_rsp *qd_rsp = NULL;
2334         struct smb2_create_rsp *op_rsp = NULL;
2335         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2336         int retry_count = 0;
2337
2338         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2339         if (!utf16_path)
2340                 return -ENOMEM;
2341
2342         if (smb3_encryption_required(tcon))
2343                 flags |= CIFS_TRANSFORM_REQ;
2344
2345         memset(rqst, 0, sizeof(rqst));
2346         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2347         memset(rsp_iov, 0, sizeof(rsp_iov));
2348
2349         /* Open */
2350         memset(&open_iov, 0, sizeof(open_iov));
2351         rqst[0].rq_iov = open_iov;
2352         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2353
2354         oparms.tcon = tcon;
2355         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2356         oparms.disposition = FILE_OPEN;
2357         oparms.create_options = cifs_create_options(cifs_sb, 0);
2358         oparms.fid = fid;
2359         oparms.reconnect = false;
2360
2361         rc = SMB2_open_init(tcon, server,
2362                             &rqst[0], &oplock, &oparms, utf16_path);
2363         if (rc)
2364                 goto qdf_free;
2365         smb2_set_next_command(tcon, &rqst[0]);
2366
2367         /* Query directory */
2368         srch_inf->entries_in_buffer = 0;
2369         srch_inf->index_of_last_entry = 2;
2370
2371         memset(&qd_iov, 0, sizeof(qd_iov));
2372         rqst[1].rq_iov = qd_iov;
2373         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2374
2375         rc = SMB2_query_directory_init(xid, tcon, server,
2376                                        &rqst[1],
2377                                        COMPOUND_FID, COMPOUND_FID,
2378                                        0, srch_inf->info_level);
2379         if (rc)
2380                 goto qdf_free;
2381
2382         smb2_set_related(&rqst[1]);
2383
2384 again:
2385         rc = compound_send_recv(xid, tcon->ses, server,
2386                                 flags, 2, rqst,
2387                                 resp_buftype, rsp_iov);
2388
2389         if (rc == -EAGAIN && retry_count++ < 10)
2390                 goto again;
2391
2392         /* If the open failed there is nothing to do */
2393         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2394         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2395                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2396                 goto qdf_free;
2397         }
2398         fid->persistent_fid = op_rsp->PersistentFileId;
2399         fid->volatile_fid = op_rsp->VolatileFileId;
2400
2401         /* Anything else than ENODATA means a genuine error */
2402         if (rc && rc != -ENODATA) {
2403                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2404                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2405                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2406                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2407                 goto qdf_free;
2408         }
2409
2410         atomic_inc(&tcon->num_remote_opens);
2411
2412         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2413         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2414                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2415                                           tcon->tid, tcon->ses->Suid, 0, 0);
2416                 srch_inf->endOfSearch = true;
2417                 rc = 0;
2418                 goto qdf_free;
2419         }
2420
2421         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2422                                         srch_inf);
2423         if (rc) {
2424                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2425                         tcon->ses->Suid, 0, 0, rc);
2426                 goto qdf_free;
2427         }
2428         resp_buftype[1] = CIFS_NO_BUFFER;
2429
2430         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2431                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2432
2433  qdf_free:
2434         kfree(utf16_path);
2435         SMB2_open_free(&rqst[0]);
2436         SMB2_query_directory_free(&rqst[1]);
2437         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2438         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2439         return rc;
2440 }
2441
2442 static int
2443 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2444                     struct cifs_fid *fid, __u16 search_flags,
2445                     struct cifs_search_info *srch_inf)
2446 {
2447         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2448                                     fid->volatile_fid, 0, srch_inf);
2449 }
2450
2451 static int
2452 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2453                struct cifs_fid *fid)
2454 {
2455         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2456 }
2457
2458 /*
2459  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2460  * the number of credits and return true. Otherwise - return false.
2461  */
2462 static bool
2463 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2464 {
2465         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2466         int scredits, in_flight;
2467
2468         if (shdr->Status != STATUS_PENDING)
2469                 return false;
2470
2471         if (shdr->CreditRequest) {
2472                 spin_lock(&server->req_lock);
2473                 server->credits += le16_to_cpu(shdr->CreditRequest);
2474                 scredits = server->credits;
2475                 in_flight = server->in_flight;
2476                 spin_unlock(&server->req_lock);
2477                 wake_up(&server->request_q);
2478
2479                 trace_smb3_add_credits(server->CurrentMid,
2480                                 server->conn_id, server->hostname, scredits,
2481                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2482                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2483                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2484         }
2485
2486         return true;
2487 }
2488
2489 static bool
2490 smb2_is_session_expired(char *buf)
2491 {
2492         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2493
2494         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2495             shdr->Status != STATUS_USER_SESSION_DELETED)
2496                 return false;
2497
2498         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2499                                le16_to_cpu(shdr->Command),
2500                                le64_to_cpu(shdr->MessageId));
2501         cifs_dbg(FYI, "Session expired or deleted\n");
2502
2503         return true;
2504 }
2505
2506 static bool
2507 smb2_is_status_io_timeout(char *buf)
2508 {
2509         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2510
2511         if (shdr->Status == STATUS_IO_TIMEOUT)
2512                 return true;
2513         else
2514                 return false;
2515 }
2516
2517 static void
2518 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2519 {
2520         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2521         struct list_head *tmp, *tmp1;
2522         struct cifs_ses *ses;
2523         struct cifs_tcon *tcon;
2524
2525         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2526                 return;
2527
2528         spin_lock(&cifs_tcp_ses_lock);
2529         list_for_each(tmp, &server->smb_ses_list) {
2530                 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
2531                 list_for_each(tmp1, &ses->tcon_list) {
2532                         tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
2533                         if (tcon->tid == shdr->TreeId) {
2534                                 tcon->need_reconnect = true;
2535                                 spin_unlock(&cifs_tcp_ses_lock);
2536                                 pr_warn_once("Server share %s deleted.\n",
2537                                              tcon->treeName);
2538                                 return;
2539                         }
2540                 }
2541         }
2542         spin_unlock(&cifs_tcp_ses_lock);
2543 }
2544
2545 static int
2546 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2547                      struct cifsInodeInfo *cinode)
2548 {
2549         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2550                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2551                                         smb2_get_lease_state(cinode));
2552
2553         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2554                                  fid->volatile_fid,
2555                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2556 }
2557
2558 void
2559 smb2_set_related(struct smb_rqst *rqst)
2560 {
2561         struct smb2_sync_hdr *shdr;
2562
2563         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2564         if (shdr == NULL) {
2565                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2566                 return;
2567         }
2568         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2569 }
2570
2571 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2572
2573 void
2574 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2575 {
2576         struct smb2_sync_hdr *shdr;
2577         struct cifs_ses *ses = tcon->ses;
2578         struct TCP_Server_Info *server = ses->server;
2579         unsigned long len = smb_rqst_len(server, rqst);
2580         int i, num_padding;
2581
2582         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2583         if (shdr == NULL) {
2584                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2585                 return;
2586         }
2587
2588         /* SMB headers in a compound are 8 byte aligned. */
2589
2590         /* No padding needed */
2591         if (!(len & 7))
2592                 goto finished;
2593
2594         num_padding = 8 - (len & 7);
2595         if (!smb3_encryption_required(tcon)) {
2596                 /*
2597                  * If we do not have encryption then we can just add an extra
2598                  * iov for the padding.
2599                  */
2600                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2601                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2602                 rqst->rq_nvec++;
2603                 len += num_padding;
2604         } else {
2605                 /*
2606                  * We can not add a small padding iov for the encryption case
2607                  * because the encryption framework can not handle the padding
2608                  * iovs.
2609                  * We have to flatten this into a single buffer and add
2610                  * the padding to it.
2611                  */
2612                 for (i = 1; i < rqst->rq_nvec; i++) {
2613                         memcpy(rqst->rq_iov[0].iov_base +
2614                                rqst->rq_iov[0].iov_len,
2615                                rqst->rq_iov[i].iov_base,
2616                                rqst->rq_iov[i].iov_len);
2617                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2618                 }
2619                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2620                        0, num_padding);
2621                 rqst->rq_iov[0].iov_len += num_padding;
2622                 len += num_padding;
2623                 rqst->rq_nvec = 1;
2624         }
2625
2626  finished:
2627         shdr->NextCommand = cpu_to_le32(len);
2628 }
2629
2630 /*
2631  * Passes the query info response back to the caller on success.
2632  * Caller need to free this with free_rsp_buf().
2633  */
2634 int
2635 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2636                          __le16 *utf16_path, u32 desired_access,
2637                          u32 class, u32 type, u32 output_len,
2638                          struct kvec *rsp, int *buftype,
2639                          struct cifs_sb_info *cifs_sb)
2640 {
2641         struct cifs_ses *ses = tcon->ses;
2642         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2643         int flags = CIFS_CP_CREATE_CLOSE_OP;
2644         struct smb_rqst rqst[3];
2645         int resp_buftype[3];
2646         struct kvec rsp_iov[3];
2647         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2648         struct kvec qi_iov[1];
2649         struct kvec close_iov[1];
2650         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2651         struct cifs_open_parms oparms;
2652         struct cifs_fid fid;
2653         int rc;
2654
2655         if (smb3_encryption_required(tcon))
2656                 flags |= CIFS_TRANSFORM_REQ;
2657
2658         memset(rqst, 0, sizeof(rqst));
2659         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2660         memset(rsp_iov, 0, sizeof(rsp_iov));
2661
2662         memset(&open_iov, 0, sizeof(open_iov));
2663         rqst[0].rq_iov = open_iov;
2664         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2665
2666         oparms.tcon = tcon;
2667         oparms.desired_access = desired_access;
2668         oparms.disposition = FILE_OPEN;
2669         oparms.create_options = cifs_create_options(cifs_sb, 0);
2670         oparms.fid = &fid;
2671         oparms.reconnect = false;
2672
2673         rc = SMB2_open_init(tcon, server,
2674                             &rqst[0], &oplock, &oparms, utf16_path);
2675         if (rc)
2676                 goto qic_exit;
2677         smb2_set_next_command(tcon, &rqst[0]);
2678
2679         memset(&qi_iov, 0, sizeof(qi_iov));
2680         rqst[1].rq_iov = qi_iov;
2681         rqst[1].rq_nvec = 1;
2682
2683         rc = SMB2_query_info_init(tcon, server,
2684                                   &rqst[1], COMPOUND_FID, COMPOUND_FID,
2685                                   class, type, 0,
2686                                   output_len, 0,
2687                                   NULL);
2688         if (rc)
2689                 goto qic_exit;
2690         smb2_set_next_command(tcon, &rqst[1]);
2691         smb2_set_related(&rqst[1]);
2692
2693         memset(&close_iov, 0, sizeof(close_iov));
2694         rqst[2].rq_iov = close_iov;
2695         rqst[2].rq_nvec = 1;
2696
2697         rc = SMB2_close_init(tcon, server,
2698                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2699         if (rc)
2700                 goto qic_exit;
2701         smb2_set_related(&rqst[2]);
2702
2703         rc = compound_send_recv(xid, ses, server,
2704                                 flags, 3, rqst,
2705                                 resp_buftype, rsp_iov);
2706         if (rc) {
2707                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2708                 if (rc == -EREMCHG) {
2709                         tcon->need_reconnect = true;
2710                         pr_warn_once("server share %s deleted\n",
2711                                      tcon->treeName);
2712                 }
2713                 goto qic_exit;
2714         }
2715         *rsp = rsp_iov[1];
2716         *buftype = resp_buftype[1];
2717
2718  qic_exit:
2719         SMB2_open_free(&rqst[0]);
2720         SMB2_query_info_free(&rqst[1]);
2721         SMB2_close_free(&rqst[2]);
2722         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2723         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2724         return rc;
2725 }
2726
2727 static int
2728 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2729              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2730 {
2731         struct smb2_query_info_rsp *rsp;
2732         struct smb2_fs_full_size_info *info = NULL;
2733         __le16 utf16_path = 0; /* Null - open root of share */
2734         struct kvec rsp_iov = {NULL, 0};
2735         int buftype = CIFS_NO_BUFFER;
2736         int rc;
2737
2738
2739         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2740                                       FILE_READ_ATTRIBUTES,
2741                                       FS_FULL_SIZE_INFORMATION,
2742                                       SMB2_O_INFO_FILESYSTEM,
2743                                       sizeof(struct smb2_fs_full_size_info),
2744                                       &rsp_iov, &buftype, cifs_sb);
2745         if (rc)
2746                 goto qfs_exit;
2747
2748         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2749         buf->f_type = SMB2_MAGIC_NUMBER;
2750         info = (struct smb2_fs_full_size_info *)(
2751                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2752         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2753                                le32_to_cpu(rsp->OutputBufferLength),
2754                                &rsp_iov,
2755                                sizeof(struct smb2_fs_full_size_info));
2756         if (!rc)
2757                 smb2_copy_fs_info_to_kstatfs(info, buf);
2758
2759 qfs_exit:
2760         free_rsp_buf(buftype, rsp_iov.iov_base);
2761         return rc;
2762 }
2763
2764 static int
2765 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2766                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2767 {
2768         int rc;
2769         __le16 srch_path = 0; /* Null - open root of share */
2770         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2771         struct cifs_open_parms oparms;
2772         struct cifs_fid fid;
2773
2774         if (!tcon->posix_extensions)
2775                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2776
2777         oparms.tcon = tcon;
2778         oparms.desired_access = FILE_READ_ATTRIBUTES;
2779         oparms.disposition = FILE_OPEN;
2780         oparms.create_options = cifs_create_options(cifs_sb, 0);
2781         oparms.fid = &fid;
2782         oparms.reconnect = false;
2783
2784         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2785                        NULL, NULL);
2786         if (rc)
2787                 return rc;
2788
2789         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2790                                    fid.volatile_fid, buf);
2791         buf->f_type = SMB2_MAGIC_NUMBER;
2792         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2793         return rc;
2794 }
2795
2796 static bool
2797 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2798 {
2799         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2800                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2801 }
2802
2803 static int
2804 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2805                __u64 length, __u32 type, int lock, int unlock, bool wait)
2806 {
2807         if (unlock && !lock)
2808                 type = SMB2_LOCKFLAG_UNLOCK;
2809         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2810                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2811                          current->tgid, length, offset, type, wait);
2812 }
2813
2814 static void
2815 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2816 {
2817         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2818 }
2819
2820 static void
2821 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2822 {
2823         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2824 }
2825
2826 static void
2827 smb2_new_lease_key(struct cifs_fid *fid)
2828 {
2829         generate_random_uuid(fid->lease_key);
2830 }
2831
2832 static int
2833 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2834                    const char *search_name,
2835                    struct dfs_info3_param **target_nodes,
2836                    unsigned int *num_of_nodes,
2837                    const struct nls_table *nls_codepage, int remap)
2838 {
2839         int rc;
2840         __le16 *utf16_path = NULL;
2841         int utf16_path_len = 0;
2842         struct cifs_tcon *tcon;
2843         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2844         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2845         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2846
2847         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2848
2849         /*
2850          * Try to use the IPC tcon, otherwise just use any
2851          */
2852         tcon = ses->tcon_ipc;
2853         if (tcon == NULL) {
2854                 spin_lock(&cifs_tcp_ses_lock);
2855                 tcon = list_first_entry_or_null(&ses->tcon_list,
2856                                                 struct cifs_tcon,
2857                                                 tcon_list);
2858                 if (tcon)
2859                         tcon->tc_count++;
2860                 spin_unlock(&cifs_tcp_ses_lock);
2861         }
2862
2863         if (tcon == NULL) {
2864                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2865                          ses);
2866                 rc = -ENOTCONN;
2867                 goto out;
2868         }
2869
2870         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2871                                            &utf16_path_len,
2872                                            nls_codepage, remap);
2873         if (!utf16_path) {
2874                 rc = -ENOMEM;
2875                 goto out;
2876         }
2877
2878         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2879         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2880         if (!dfs_req) {
2881                 rc = -ENOMEM;
2882                 goto out;
2883         }
2884
2885         /* Highest DFS referral version understood */
2886         dfs_req->MaxReferralLevel = DFS_VERSION;
2887
2888         /* Path to resolve in an UTF-16 null-terminated string */
2889         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2890
2891         do {
2892                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2893                                 FSCTL_DFS_GET_REFERRALS,
2894                                 true /* is_fsctl */,
2895                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2896                                 (char **)&dfs_rsp, &dfs_rsp_size);
2897         } while (rc == -EAGAIN);
2898
2899         if (rc) {
2900                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2901                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2902                 goto out;
2903         }
2904
2905         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2906                                  num_of_nodes, target_nodes,
2907                                  nls_codepage, remap, search_name,
2908                                  true /* is_unicode */);
2909         if (rc) {
2910                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2911                 goto out;
2912         }
2913
2914  out:
2915         if (tcon && !tcon->ipc) {
2916                 /* ipc tcons are not refcounted */
2917                 spin_lock(&cifs_tcp_ses_lock);
2918                 tcon->tc_count--;
2919                 /* tc_count can never go negative */
2920                 WARN_ON(tcon->tc_count < 0);
2921                 spin_unlock(&cifs_tcp_ses_lock);
2922         }
2923         kfree(utf16_path);
2924         kfree(dfs_req);
2925         kfree(dfs_rsp);
2926         return rc;
2927 }
2928
2929 static int
2930 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2931                       u32 plen, char **target_path,
2932                       struct cifs_sb_info *cifs_sb)
2933 {
2934         unsigned int len;
2935
2936         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2937         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2938
2939         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2940                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2941                         le64_to_cpu(symlink_buf->InodeType));
2942                 return -EOPNOTSUPP;
2943         }
2944
2945         *target_path = cifs_strndup_from_utf16(
2946                                 symlink_buf->PathBuffer,
2947                                 len, true, cifs_sb->local_nls);
2948         if (!(*target_path))
2949                 return -ENOMEM;
2950
2951         convert_delimiter(*target_path, '/');
2952         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2953
2954         return 0;
2955 }
2956
2957 static int
2958 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2959                       u32 plen, char **target_path,
2960                       struct cifs_sb_info *cifs_sb)
2961 {
2962         unsigned int sub_len;
2963         unsigned int sub_offset;
2964
2965         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2966
2967         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2968         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2969         if (sub_offset + 20 > plen ||
2970             sub_offset + sub_len + 20 > plen) {
2971                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2972                 return -EIO;
2973         }
2974
2975         *target_path = cifs_strndup_from_utf16(
2976                                 symlink_buf->PathBuffer + sub_offset,
2977                                 sub_len, true, cifs_sb->local_nls);
2978         if (!(*target_path))
2979                 return -ENOMEM;
2980
2981         convert_delimiter(*target_path, '/');
2982         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2983
2984         return 0;
2985 }
2986
2987 static int
2988 parse_reparse_point(struct reparse_data_buffer *buf,
2989                     u32 plen, char **target_path,
2990                     struct cifs_sb_info *cifs_sb)
2991 {
2992         if (plen < sizeof(struct reparse_data_buffer)) {
2993                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2994                          plen);
2995                 return -EIO;
2996         }
2997
2998         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2999             sizeof(struct reparse_data_buffer)) {
3000                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
3001                          plen);
3002                 return -EIO;
3003         }
3004
3005         /* See MS-FSCC 2.1.2 */
3006         switch (le32_to_cpu(buf->ReparseTag)) {
3007         case IO_REPARSE_TAG_NFS:
3008                 return parse_reparse_posix(
3009                         (struct reparse_posix_data *)buf,
3010                         plen, target_path, cifs_sb);
3011         case IO_REPARSE_TAG_SYMLINK:
3012                 return parse_reparse_symlink(
3013                         (struct reparse_symlink_data_buffer *)buf,
3014                         plen, target_path, cifs_sb);
3015         default:
3016                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
3017                          le32_to_cpu(buf->ReparseTag));
3018                 return -EOPNOTSUPP;
3019         }
3020 }
3021
3022 #define SMB2_SYMLINK_STRUCT_SIZE \
3023         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
3024
3025 static int
3026 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
3027                    struct cifs_sb_info *cifs_sb, const char *full_path,
3028                    char **target_path, bool is_reparse_point)
3029 {
3030         int rc;
3031         __le16 *utf16_path = NULL;
3032         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3033         struct cifs_open_parms oparms;
3034         struct cifs_fid fid;
3035         struct kvec err_iov = {NULL, 0};
3036         struct smb2_err_rsp *err_buf = NULL;
3037         struct smb2_symlink_err_rsp *symlink;
3038         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3039         unsigned int sub_len;
3040         unsigned int sub_offset;
3041         unsigned int print_len;
3042         unsigned int print_offset;
3043         int flags = CIFS_CP_CREATE_CLOSE_OP;
3044         struct smb_rqst rqst[3];
3045         int resp_buftype[3];
3046         struct kvec rsp_iov[3];
3047         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3048         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3049         struct kvec close_iov[1];
3050         struct smb2_create_rsp *create_rsp;
3051         struct smb2_ioctl_rsp *ioctl_rsp;
3052         struct reparse_data_buffer *reparse_buf;
3053         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
3054         u32 plen;
3055
3056         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3057
3058         *target_path = NULL;
3059
3060         if (smb3_encryption_required(tcon))
3061                 flags |= CIFS_TRANSFORM_REQ;
3062
3063         memset(rqst, 0, sizeof(rqst));
3064         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3065         memset(rsp_iov, 0, sizeof(rsp_iov));
3066
3067         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3068         if (!utf16_path)
3069                 return -ENOMEM;
3070
3071         /* Open */
3072         memset(&open_iov, 0, sizeof(open_iov));
3073         rqst[0].rq_iov = open_iov;
3074         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3075
3076         memset(&oparms, 0, sizeof(oparms));
3077         oparms.tcon = tcon;
3078         oparms.desired_access = FILE_READ_ATTRIBUTES;
3079         oparms.disposition = FILE_OPEN;
3080         oparms.create_options = cifs_create_options(cifs_sb, create_options);
3081         oparms.fid = &fid;
3082         oparms.reconnect = false;
3083
3084         rc = SMB2_open_init(tcon, server,
3085                             &rqst[0], &oplock, &oparms, utf16_path);
3086         if (rc)
3087                 goto querty_exit;
3088         smb2_set_next_command(tcon, &rqst[0]);
3089
3090
3091         /* IOCTL */
3092         memset(&io_iov, 0, sizeof(io_iov));
3093         rqst[1].rq_iov = io_iov;
3094         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3095
3096         rc = SMB2_ioctl_init(tcon, server,
3097                              &rqst[1], fid.persistent_fid,
3098                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
3099                              true /* is_fctl */, NULL, 0,
3100                              CIFSMaxBufSize -
3101                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3102                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3103         if (rc)
3104                 goto querty_exit;
3105
3106         smb2_set_next_command(tcon, &rqst[1]);
3107         smb2_set_related(&rqst[1]);
3108
3109
3110         /* Close */
3111         memset(&close_iov, 0, sizeof(close_iov));
3112         rqst[2].rq_iov = close_iov;
3113         rqst[2].rq_nvec = 1;
3114
3115         rc = SMB2_close_init(tcon, server,
3116                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3117         if (rc)
3118                 goto querty_exit;
3119
3120         smb2_set_related(&rqst[2]);
3121
3122         rc = compound_send_recv(xid, tcon->ses, server,
3123                                 flags, 3, rqst,
3124                                 resp_buftype, rsp_iov);
3125
3126         create_rsp = rsp_iov[0].iov_base;
3127         if (create_rsp && create_rsp->sync_hdr.Status)
3128                 err_iov = rsp_iov[0];
3129         ioctl_rsp = rsp_iov[1].iov_base;
3130
3131         /*
3132          * Open was successful and we got an ioctl response.
3133          */
3134         if ((rc == 0) && (is_reparse_point)) {
3135                 /* See MS-FSCC 2.3.23 */
3136
3137                 reparse_buf = (struct reparse_data_buffer *)
3138                         ((char *)ioctl_rsp +
3139                          le32_to_cpu(ioctl_rsp->OutputOffset));
3140                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3141
3142                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3143                     rsp_iov[1].iov_len) {
3144                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3145                                  plen);
3146                         rc = -EIO;
3147                         goto querty_exit;
3148                 }
3149
3150                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3151                                          cifs_sb);
3152                 goto querty_exit;
3153         }
3154
3155         if (!rc || !err_iov.iov_base) {
3156                 rc = -ENOENT;
3157                 goto querty_exit;
3158         }
3159
3160         err_buf = err_iov.iov_base;
3161         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3162             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3163                 rc = -EINVAL;
3164                 goto querty_exit;
3165         }
3166
3167         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3168         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3169             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3170                 rc = -EINVAL;
3171                 goto querty_exit;
3172         }
3173
3174         /* open must fail on symlink - reset rc */
3175         rc = 0;
3176         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3177         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3178         print_len = le16_to_cpu(symlink->PrintNameLength);
3179         print_offset = le16_to_cpu(symlink->PrintNameOffset);
3180
3181         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3182                 rc = -EINVAL;
3183                 goto querty_exit;
3184         }
3185
3186         if (err_iov.iov_len <
3187             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3188                 rc = -EINVAL;
3189                 goto querty_exit;
3190         }
3191
3192         *target_path = cifs_strndup_from_utf16(
3193                                 (char *)symlink->PathBuffer + sub_offset,
3194                                 sub_len, true, cifs_sb->local_nls);
3195         if (!(*target_path)) {
3196                 rc = -ENOMEM;
3197                 goto querty_exit;
3198         }
3199         convert_delimiter(*target_path, '/');
3200         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3201
3202  querty_exit:
3203         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3204         kfree(utf16_path);
3205         SMB2_open_free(&rqst[0]);
3206         SMB2_ioctl_free(&rqst[1]);
3207         SMB2_close_free(&rqst[2]);
3208         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3209         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3210         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3211         return rc;
3212 }
3213
3214 int
3215 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3216                    struct cifs_sb_info *cifs_sb, const char *full_path,
3217                    __u32 *tag)
3218 {
3219         int rc;
3220         __le16 *utf16_path = NULL;
3221         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3222         struct cifs_open_parms oparms;
3223         struct cifs_fid fid;
3224         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3225         int flags = CIFS_CP_CREATE_CLOSE_OP;
3226         struct smb_rqst rqst[3];
3227         int resp_buftype[3];
3228         struct kvec rsp_iov[3];
3229         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3230         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3231         struct kvec close_iov[1];
3232         struct smb2_ioctl_rsp *ioctl_rsp;
3233         struct reparse_data_buffer *reparse_buf;
3234         u32 plen;
3235
3236         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3237
3238         if (smb3_encryption_required(tcon))
3239                 flags |= CIFS_TRANSFORM_REQ;
3240
3241         memset(rqst, 0, sizeof(rqst));
3242         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3243         memset(rsp_iov, 0, sizeof(rsp_iov));
3244
3245         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3246         if (!utf16_path)
3247                 return -ENOMEM;
3248
3249         /*
3250          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3251          * to see if there is a handle already open that we can use
3252          */
3253         memset(&open_iov, 0, sizeof(open_iov));
3254         rqst[0].rq_iov = open_iov;
3255         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3256
3257         memset(&oparms, 0, sizeof(oparms));
3258         oparms.tcon = tcon;
3259         oparms.desired_access = FILE_READ_ATTRIBUTES;
3260         oparms.disposition = FILE_OPEN;
3261         oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3262         oparms.fid = &fid;
3263         oparms.reconnect = false;
3264
3265         rc = SMB2_open_init(tcon, server,
3266                             &rqst[0], &oplock, &oparms, utf16_path);
3267         if (rc)
3268                 goto query_rp_exit;
3269         smb2_set_next_command(tcon, &rqst[0]);
3270
3271
3272         /* IOCTL */
3273         memset(&io_iov, 0, sizeof(io_iov));
3274         rqst[1].rq_iov = io_iov;
3275         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3276
3277         rc = SMB2_ioctl_init(tcon, server,
3278                              &rqst[1], COMPOUND_FID,
3279                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT,
3280                              true /* is_fctl */, NULL, 0,
3281                              CIFSMaxBufSize -
3282                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3283                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3284         if (rc)
3285                 goto query_rp_exit;
3286
3287         smb2_set_next_command(tcon, &rqst[1]);
3288         smb2_set_related(&rqst[1]);
3289
3290
3291         /* Close */
3292         memset(&close_iov, 0, sizeof(close_iov));
3293         rqst[2].rq_iov = close_iov;
3294         rqst[2].rq_nvec = 1;
3295
3296         rc = SMB2_close_init(tcon, server,
3297                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3298         if (rc)
3299                 goto query_rp_exit;
3300
3301         smb2_set_related(&rqst[2]);
3302
3303         rc = compound_send_recv(xid, tcon->ses, server,
3304                                 flags, 3, rqst,
3305                                 resp_buftype, rsp_iov);
3306
3307         ioctl_rsp = rsp_iov[1].iov_base;
3308
3309         /*
3310          * Open was successful and we got an ioctl response.
3311          */
3312         if (rc == 0) {
3313                 /* See MS-FSCC 2.3.23 */
3314
3315                 reparse_buf = (struct reparse_data_buffer *)
3316                         ((char *)ioctl_rsp +
3317                          le32_to_cpu(ioctl_rsp->OutputOffset));
3318                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3319
3320                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3321                     rsp_iov[1].iov_len) {
3322                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3323                                  plen);
3324                         rc = -EIO;
3325                         goto query_rp_exit;
3326                 }
3327                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3328         }
3329
3330  query_rp_exit:
3331         kfree(utf16_path);
3332         SMB2_open_free(&rqst[0]);
3333         SMB2_ioctl_free(&rqst[1]);
3334         SMB2_close_free(&rqst[2]);
3335         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3336         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3337         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3338         return rc;
3339 }
3340
3341 static struct cifs_ntsd *
3342 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3343                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3344 {
3345         struct cifs_ntsd *pntsd = NULL;
3346         unsigned int xid;
3347         int rc = -EOPNOTSUPP;
3348         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3349
3350         if (IS_ERR(tlink))
3351                 return ERR_CAST(tlink);
3352
3353         xid = get_xid();
3354         cifs_dbg(FYI, "trying to get acl\n");
3355
3356         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3357                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3358                             info);
3359         free_xid(xid);
3360
3361         cifs_put_tlink(tlink);
3362
3363         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3364         if (rc)
3365                 return ERR_PTR(rc);
3366         return pntsd;
3367
3368 }
3369
3370 static struct cifs_ntsd *
3371 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3372                      const char *path, u32 *pacllen, u32 info)
3373 {
3374         struct cifs_ntsd *pntsd = NULL;
3375         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3376         unsigned int xid;
3377         int rc;
3378         struct cifs_tcon *tcon;
3379         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3380         struct cifs_fid fid;
3381         struct cifs_open_parms oparms;
3382         __le16 *utf16_path;
3383
3384         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3385         if (IS_ERR(tlink))
3386                 return ERR_CAST(tlink);
3387
3388         tcon = tlink_tcon(tlink);
3389         xid = get_xid();
3390
3391         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3392         if (!utf16_path) {
3393                 rc = -ENOMEM;
3394                 free_xid(xid);
3395                 return ERR_PTR(rc);
3396         }
3397
3398         oparms.tcon = tcon;
3399         oparms.desired_access = READ_CONTROL;
3400         oparms.disposition = FILE_OPEN;
3401         /*
3402          * When querying an ACL, even if the file is a symlink we want to open
3403          * the source not the target, and so the protocol requires that the
3404          * client specify this flag when opening a reparse point
3405          */
3406         oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3407         oparms.fid = &fid;
3408         oparms.reconnect = false;
3409
3410         if (info & SACL_SECINFO)
3411                 oparms.desired_access |= SYSTEM_SECURITY;
3412
3413         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3414                        NULL);
3415         kfree(utf16_path);
3416         if (!rc) {
3417                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3418                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3419                                     info);
3420                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3421         }
3422
3423         cifs_put_tlink(tlink);
3424         free_xid(xid);
3425
3426         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3427         if (rc)
3428                 return ERR_PTR(rc);
3429         return pntsd;
3430 }
3431
3432 static int
3433 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3434                 struct inode *inode, const char *path, int aclflag)
3435 {
3436         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3437         unsigned int xid;
3438         int rc, access_flags = 0;
3439         struct cifs_tcon *tcon;
3440         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3441         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3442         struct cifs_fid fid;
3443         struct cifs_open_parms oparms;
3444         __le16 *utf16_path;
3445
3446         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3447         if (IS_ERR(tlink))
3448                 return PTR_ERR(tlink);
3449
3450         tcon = tlink_tcon(tlink);
3451         xid = get_xid();
3452
3453         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3454                 access_flags |= WRITE_OWNER;
3455         if (aclflag & CIFS_ACL_SACL)
3456                 access_flags |= SYSTEM_SECURITY;
3457         if (aclflag & CIFS_ACL_DACL)
3458                 access_flags |= WRITE_DAC;
3459
3460         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3461         if (!utf16_path) {
3462                 rc = -ENOMEM;
3463                 free_xid(xid);
3464                 return rc;
3465         }
3466
3467         oparms.tcon = tcon;
3468         oparms.desired_access = access_flags;
3469         oparms.create_options = cifs_create_options(cifs_sb, 0);
3470         oparms.disposition = FILE_OPEN;
3471         oparms.path = path;
3472         oparms.fid = &fid;
3473         oparms.reconnect = false;
3474
3475         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3476                        NULL, NULL);
3477         kfree(utf16_path);
3478         if (!rc) {
3479                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3480                             fid.volatile_fid, pnntsd, acllen, aclflag);
3481                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3482         }
3483
3484         cifs_put_tlink(tlink);
3485         free_xid(xid);
3486         return rc;
3487 }
3488
3489 /* Retrieve an ACL from the server */
3490 static struct cifs_ntsd *
3491 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3492              struct inode *inode, const char *path,
3493              u32 *pacllen, u32 info)
3494 {
3495         struct cifs_ntsd *pntsd = NULL;
3496         struct cifsFileInfo *open_file = NULL;
3497
3498         if (inode && !(info & SACL_SECINFO))
3499                 open_file = find_readable_file(CIFS_I(inode), true);
3500         if (!open_file || (info & SACL_SECINFO))
3501                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3502
3503         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3504         cifsFileInfo_put(open_file);
3505         return pntsd;
3506 }
3507
3508 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3509                             loff_t offset, loff_t len, bool keep_size)
3510 {
3511         struct cifs_ses *ses = tcon->ses;
3512         struct inode *inode;
3513         struct cifsInodeInfo *cifsi;
3514         struct cifsFileInfo *cfile = file->private_data;
3515         struct file_zero_data_information fsctl_buf;
3516         long rc;
3517         unsigned int xid;
3518         __le64 eof;
3519
3520         xid = get_xid();
3521
3522         inode = d_inode(cfile->dentry);
3523         cifsi = CIFS_I(inode);
3524
3525         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3526                               ses->Suid, offset, len);
3527
3528         /*
3529          * We zero the range through ioctl, so we need remove the page caches
3530          * first, otherwise the data may be inconsistent with the server.
3531          */
3532         truncate_pagecache_range(inode, offset, offset + len - 1);
3533
3534         /* if file not oplocked can't be sure whether asking to extend size */
3535         if (!CIFS_CACHE_READ(cifsi))
3536                 if (keep_size == false) {
3537                         rc = -EOPNOTSUPP;
3538                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3539                                 tcon->tid, ses->Suid, offset, len, rc);
3540                         free_xid(xid);
3541                         return rc;
3542                 }
3543
3544         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3545
3546         fsctl_buf.FileOffset = cpu_to_le64(offset);
3547         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3548
3549         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3550                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3551                         (char *)&fsctl_buf,
3552                         sizeof(struct file_zero_data_information),
3553                         0, NULL, NULL);
3554         if (rc)
3555                 goto zero_range_exit;
3556
3557         /*
3558          * do we also need to change the size of the file?
3559          */
3560         if (keep_size == false && i_size_read(inode) < offset + len) {
3561                 eof = cpu_to_le64(offset + len);
3562                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3563                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3564         }
3565
3566  zero_range_exit:
3567         free_xid(xid);
3568         if (rc)
3569                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3570                               ses->Suid, offset, len, rc);
3571         else
3572                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3573                               ses->Suid, offset, len);
3574         return rc;
3575 }
3576
3577 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3578                             loff_t offset, loff_t len)
3579 {
3580         struct inode *inode;
3581         struct cifsFileInfo *cfile = file->private_data;
3582         struct file_zero_data_information fsctl_buf;
3583         long rc;
3584         unsigned int xid;
3585         __u8 set_sparse = 1;
3586
3587         xid = get_xid();
3588
3589         inode = d_inode(cfile->dentry);
3590
3591         /* Need to make file sparse, if not already, before freeing range. */
3592         /* Consider adding equivalent for compressed since it could also work */
3593         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3594                 rc = -EOPNOTSUPP;
3595                 free_xid(xid);
3596                 return rc;
3597         }
3598
3599         filemap_invalidate_lock(inode->i_mapping);
3600         /*
3601          * We implement the punch hole through ioctl, so we need remove the page
3602          * caches first, otherwise the data may be inconsistent with the server.
3603          */
3604         truncate_pagecache_range(inode, offset, offset + len - 1);
3605
3606         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3607
3608         fsctl_buf.FileOffset = cpu_to_le64(offset);
3609         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3610
3611         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3612                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3613                         true /* is_fctl */, (char *)&fsctl_buf,
3614                         sizeof(struct file_zero_data_information),
3615                         CIFSMaxBufSize, NULL, NULL);
3616         free_xid(xid);
3617         filemap_invalidate_unlock(inode->i_mapping);
3618         return rc;
3619 }
3620
3621 static int smb3_simple_fallocate_write_range(unsigned int xid,
3622                                              struct cifs_tcon *tcon,
3623                                              struct cifsFileInfo *cfile,
3624                                              loff_t off, loff_t len,
3625                                              char *buf)
3626 {
3627         struct cifs_io_parms io_parms = {0};
3628         int nbytes;
3629         int rc = 0;
3630         struct kvec iov[2];
3631
3632         io_parms.netfid = cfile->fid.netfid;
3633         io_parms.pid = current->tgid;
3634         io_parms.tcon = tcon;
3635         io_parms.persistent_fid = cfile->fid.persistent_fid;
3636         io_parms.volatile_fid = cfile->fid.volatile_fid;
3637
3638         while (len) {
3639                 io_parms.offset = off;
3640                 io_parms.length = len;
3641                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3642                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3643                 /* iov[0] is reserved for smb header */
3644                 iov[1].iov_base = buf;
3645                 iov[1].iov_len = io_parms.length;
3646                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3647                 if (rc)
3648                         break;
3649                 if (nbytes > len)
3650                         return -EINVAL;
3651                 buf += nbytes;
3652                 off += nbytes;
3653                 len -= nbytes;
3654         }
3655         return rc;
3656 }
3657
3658 static int smb3_simple_fallocate_range(unsigned int xid,
3659                                        struct cifs_tcon *tcon,
3660                                        struct cifsFileInfo *cfile,
3661                                        loff_t off, loff_t len)
3662 {
3663         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3664         u32 out_data_len;
3665         char *buf = NULL;
3666         loff_t l;
3667         int rc;
3668
3669         in_data.file_offset = cpu_to_le64(off);
3670         in_data.length = cpu_to_le64(len);
3671         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3672                         cfile->fid.volatile_fid,
3673                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3674                         (char *)&in_data, sizeof(in_data),
3675                         1024 * sizeof(struct file_allocated_range_buffer),
3676                         (char **)&out_data, &out_data_len);
3677         if (rc)
3678                 goto out;
3679
3680         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3681         if (buf == NULL) {
3682                 rc = -ENOMEM;
3683                 goto out;
3684         }
3685
3686         tmp_data = out_data;
3687         while (len) {
3688                 /*
3689                  * The rest of the region is unmapped so write it all.
3690                  */
3691                 if (out_data_len == 0) {
3692                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3693                                                cfile, off, len, buf);
3694                         goto out;
3695                 }
3696
3697                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3698                         rc = -EINVAL;
3699                         goto out;
3700                 }
3701
3702                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3703                         /*
3704                          * We are at a hole. Write until the end of the region
3705                          * or until the next allocated data,
3706                          * whichever comes next.
3707                          */
3708                         l = le64_to_cpu(tmp_data->file_offset) - off;
3709                         if (len < l)
3710                                 l = len;
3711                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3712                                                cfile, off, l, buf);
3713                         if (rc)
3714                                 goto out;
3715                         off = off + l;
3716                         len = len - l;
3717                         if (len == 0)
3718                                 goto out;
3719                 }
3720                 /*
3721                  * We are at a section of allocated data, just skip forward
3722                  * until the end of the data or the end of the region
3723                  * we are supposed to fallocate, whichever comes first.
3724                  */
3725                 l = le64_to_cpu(tmp_data->length);
3726                 if (len < l)
3727                         l = len;
3728                 off += l;
3729                 len -= l;
3730
3731                 tmp_data = &tmp_data[1];
3732                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3733         }
3734
3735  out:
3736         kfree(out_data);
3737         kfree(buf);
3738         return rc;
3739 }
3740
3741
3742 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3743                             loff_t off, loff_t len, bool keep_size)
3744 {
3745         struct inode *inode;
3746         struct cifsInodeInfo *cifsi;
3747         struct cifsFileInfo *cfile = file->private_data;
3748         long rc = -EOPNOTSUPP;
3749         unsigned int xid;
3750         __le64 eof;
3751
3752         xid = get_xid();
3753
3754         inode = d_inode(cfile->dentry);
3755         cifsi = CIFS_I(inode);
3756
3757         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3758                                 tcon->ses->Suid, off, len);
3759         /* if file not oplocked can't be sure whether asking to extend size */
3760         if (!CIFS_CACHE_READ(cifsi))
3761                 if (keep_size == false) {
3762                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3763                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3764                         free_xid(xid);
3765                         return rc;
3766                 }
3767
3768         /*
3769          * Extending the file
3770          */
3771         if ((keep_size == false) && i_size_read(inode) < off + len) {
3772                 rc = inode_newsize_ok(inode, off + len);
3773                 if (rc)
3774                         goto out;
3775
3776                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3777                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3778
3779                 eof = cpu_to_le64(off + len);
3780                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3781                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3782                 if (rc == 0) {
3783                         cifsi->server_eof = off + len;
3784                         cifs_setsize(inode, off + len);
3785                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3786                         truncate_setsize(inode, off + len);
3787                 }
3788                 goto out;
3789         }
3790
3791         /*
3792          * Files are non-sparse by default so falloc may be a no-op
3793          * Must check if file sparse. If not sparse, and since we are not
3794          * extending then no need to do anything since file already allocated
3795          */
3796         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3797                 rc = 0;
3798                 goto out;
3799         }
3800
3801         if (keep_size == true) {
3802                 /*
3803                  * We can not preallocate pages beyond the end of the file
3804                  * in SMB2
3805                  */
3806                 if (off >= i_size_read(inode)) {
3807                         rc = 0;
3808                         goto out;
3809                 }
3810                 /*
3811                  * For fallocates that are partially beyond the end of file,
3812                  * clamp len so we only fallocate up to the end of file.
3813                  */
3814                 if (off + len > i_size_read(inode)) {
3815                         len = i_size_read(inode) - off;
3816                 }
3817         }
3818
3819         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3820                 /*
3821                  * At this point, we are trying to fallocate an internal
3822                  * regions of a sparse file. Since smb2 does not have a
3823                  * fallocate command we have two otions on how to emulate this.
3824                  * We can either turn the entire file to become non-sparse
3825                  * which we only do if the fallocate is for virtually
3826                  * the whole file,  or we can overwrite the region with zeroes
3827                  * using SMB2_write, which could be prohibitevly expensive
3828                  * if len is large.
3829                  */
3830                 /*
3831                  * We are only trying to fallocate a small region so
3832                  * just write it with zero.
3833                  */
3834                 if (len <= 1024 * 1024) {
3835                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3836                                                          off, len);
3837                         goto out;
3838                 }
3839
3840                 /*
3841                  * Check if falloc starts within first few pages of file
3842                  * and ends within a few pages of the end of file to
3843                  * ensure that most of file is being forced to be
3844                  * fallocated now. If so then setting whole file sparse
3845                  * ie potentially making a few extra pages at the beginning
3846                  * or end of the file non-sparse via set_sparse is harmless.
3847                  */
3848                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3849                         rc = -EOPNOTSUPP;
3850                         goto out;
3851                 }
3852         }
3853
3854         smb2_set_sparse(xid, tcon, cfile, inode, false);
3855         rc = 0;
3856
3857 out:
3858         if (rc)
3859                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3860                                 tcon->ses->Suid, off, len, rc);
3861         else
3862                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3863                                 tcon->ses->Suid, off, len);
3864
3865         free_xid(xid);
3866         return rc;
3867 }
3868
3869 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3870                             loff_t off, loff_t len)
3871 {
3872         int rc;
3873         unsigned int xid;
3874         struct cifsFileInfo *cfile = file->private_data;
3875         __le64 eof;
3876
3877         xid = get_xid();
3878
3879         if (off >= i_size_read(file->f_inode) ||
3880             off + len >= i_size_read(file->f_inode)) {
3881                 rc = -EINVAL;
3882                 goto out;
3883         }
3884
3885         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3886                                   i_size_read(file->f_inode) - off - len, off);
3887         if (rc < 0)
3888                 goto out;
3889
3890         eof = cpu_to_le64(i_size_read(file->f_inode) - len);
3891         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3892                           cfile->fid.volatile_fid, cfile->pid, &eof);
3893         if (rc < 0)
3894                 goto out;
3895
3896         rc = 0;
3897  out:
3898         free_xid(xid);
3899         return rc;
3900 }
3901
3902 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3903                               loff_t off, loff_t len)
3904 {
3905         int rc;
3906         unsigned int xid;
3907         struct cifsFileInfo *cfile = file->private_data;
3908         __le64 eof;
3909         __u64  count;
3910
3911         xid = get_xid();
3912
3913         if (off >= i_size_read(file->f_inode)) {
3914                 rc = -EINVAL;
3915                 goto out;
3916         }
3917
3918         count = i_size_read(file->f_inode) - off;
3919         eof = cpu_to_le64(i_size_read(file->f_inode) + len);
3920
3921         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3922                           cfile->fid.volatile_fid, cfile->pid, &eof);
3923         if (rc < 0)
3924                 goto out;
3925
3926         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3927         if (rc < 0)
3928                 goto out;
3929
3930         rc = smb3_zero_range(file, tcon, off, len, 1);
3931         if (rc < 0)
3932                 goto out;
3933
3934         rc = 0;
3935  out:
3936         free_xid(xid);
3937         return rc;
3938 }
3939
3940 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3941 {
3942         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3943         struct cifsInodeInfo *cifsi;
3944         struct inode *inode;
3945         int rc = 0;
3946         struct file_allocated_range_buffer in_data, *out_data = NULL;
3947         u32 out_data_len;
3948         unsigned int xid;
3949
3950         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3951                 return generic_file_llseek(file, offset, whence);
3952
3953         inode = d_inode(cfile->dentry);
3954         cifsi = CIFS_I(inode);
3955
3956         if (offset < 0 || offset >= i_size_read(inode))
3957                 return -ENXIO;
3958
3959         xid = get_xid();
3960         /*
3961          * We need to be sure that all dirty pages are written as they
3962          * might fill holes on the server.
3963          * Note that we also MUST flush any written pages since at least
3964          * some servers (Windows2016) will not reflect recent writes in
3965          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3966          */
3967         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3968         if (wrcfile) {
3969                 filemap_write_and_wait(inode->i_mapping);
3970                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3971                 cifsFileInfo_put(wrcfile);
3972         }
3973
3974         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3975                 if (whence == SEEK_HOLE)
3976                         offset = i_size_read(inode);
3977                 goto lseek_exit;
3978         }
3979
3980         in_data.file_offset = cpu_to_le64(offset);
3981         in_data.length = cpu_to_le64(i_size_read(inode));
3982
3983         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3984                         cfile->fid.volatile_fid,
3985                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3986                         (char *)&in_data, sizeof(in_data),
3987                         sizeof(struct file_allocated_range_buffer),
3988                         (char **)&out_data, &out_data_len);
3989         if (rc == -E2BIG)
3990                 rc = 0;
3991         if (rc)
3992                 goto lseek_exit;
3993
3994         if (whence == SEEK_HOLE && out_data_len == 0)
3995                 goto lseek_exit;
3996
3997         if (whence == SEEK_DATA && out_data_len == 0) {
3998                 rc = -ENXIO;
3999                 goto lseek_exit;
4000         }
4001
4002         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
4003                 rc = -EINVAL;
4004                 goto lseek_exit;
4005         }
4006         if (whence == SEEK_DATA) {
4007                 offset = le64_to_cpu(out_data->file_offset);
4008                 goto lseek_exit;
4009         }
4010         if (offset < le64_to_cpu(out_data->file_offset))
4011                 goto lseek_exit;
4012
4013         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
4014
4015  lseek_exit:
4016         free_xid(xid);
4017         kfree(out_data);
4018         if (!rc)
4019                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
4020         else
4021                 return rc;
4022 }
4023
4024 static int smb3_fiemap(struct cifs_tcon *tcon,
4025                        struct cifsFileInfo *cfile,
4026                        struct fiemap_extent_info *fei, u64 start, u64 len)
4027 {
4028         unsigned int xid;
4029         struct file_allocated_range_buffer in_data, *out_data;
4030         u32 out_data_len;
4031         int i, num, rc, flags, last_blob;
4032         u64 next;
4033
4034         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
4035         if (rc)
4036                 return rc;
4037
4038         xid = get_xid();
4039  again:
4040         in_data.file_offset = cpu_to_le64(start);
4041         in_data.length = cpu_to_le64(len);
4042
4043         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
4044                         cfile->fid.volatile_fid,
4045                         FSCTL_QUERY_ALLOCATED_RANGES, true,
4046                         (char *)&in_data, sizeof(in_data),
4047                         1024 * sizeof(struct file_allocated_range_buffer),
4048                         (char **)&out_data, &out_data_len);
4049         if (rc == -E2BIG) {
4050                 last_blob = 0;
4051                 rc = 0;
4052         } else
4053                 last_blob = 1;
4054         if (rc)
4055                 goto out;
4056
4057         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
4058                 rc = -EINVAL;
4059                 goto out;
4060         }
4061         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
4062                 rc = -EINVAL;
4063                 goto out;
4064         }
4065
4066         num = out_data_len / sizeof(struct file_allocated_range_buffer);
4067         for (i = 0; i < num; i++) {
4068                 flags = 0;
4069                 if (i == num - 1 && last_blob)
4070                         flags |= FIEMAP_EXTENT_LAST;
4071
4072                 rc = fiemap_fill_next_extent(fei,
4073                                 le64_to_cpu(out_data[i].file_offset),
4074                                 le64_to_cpu(out_data[i].file_offset),
4075                                 le64_to_cpu(out_data[i].length),
4076                                 flags);
4077                 if (rc < 0)
4078                         goto out;
4079                 if (rc == 1) {
4080                         rc = 0;
4081                         goto out;
4082                 }
4083         }
4084
4085         if (!last_blob) {
4086                 next = le64_to_cpu(out_data[num - 1].file_offset) +
4087                   le64_to_cpu(out_data[num - 1].length);
4088                 len = len - (next - start);
4089                 start = next;
4090                 goto again;
4091         }
4092
4093  out:
4094         free_xid(xid);
4095         kfree(out_data);
4096         return rc;
4097 }
4098
4099 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
4100                            loff_t off, loff_t len)
4101 {
4102         /* KEEP_SIZE already checked for by do_fallocate */
4103         if (mode & FALLOC_FL_PUNCH_HOLE)
4104                 return smb3_punch_hole(file, tcon, off, len);
4105         else if (mode & FALLOC_FL_ZERO_RANGE) {
4106                 if (mode & FALLOC_FL_KEEP_SIZE)
4107                         return smb3_zero_range(file, tcon, off, len, true);
4108                 return smb3_zero_range(file, tcon, off, len, false);
4109         } else if (mode == FALLOC_FL_KEEP_SIZE)
4110                 return smb3_simple_falloc(file, tcon, off, len, true);
4111         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
4112                 return smb3_collapse_range(file, tcon, off, len);
4113         else if (mode == FALLOC_FL_INSERT_RANGE)
4114                 return smb3_insert_range(file, tcon, off, len);
4115         else if (mode == 0)
4116                 return smb3_simple_falloc(file, tcon, off, len, false);
4117
4118         return -EOPNOTSUPP;
4119 }
4120
4121 static void
4122 smb2_downgrade_oplock(struct TCP_Server_Info *server,
4123                       struct cifsInodeInfo *cinode, __u32 oplock,
4124                       unsigned int epoch, bool *purge_cache)
4125 {
4126         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
4127 }
4128
4129 static void
4130 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4131                        unsigned int epoch, bool *purge_cache);
4132
4133 static void
4134 smb3_downgrade_oplock(struct TCP_Server_Info *server,
4135                        struct cifsInodeInfo *cinode, __u32 oplock,
4136                        unsigned int epoch, bool *purge_cache)
4137 {
4138         unsigned int old_state = cinode->oplock;
4139         unsigned int old_epoch = cinode->epoch;
4140         unsigned int new_state;
4141
4142         if (epoch > old_epoch) {
4143                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
4144                 cinode->epoch = epoch;
4145         }
4146
4147         new_state = cinode->oplock;
4148         *purge_cache = false;
4149
4150         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
4151             (new_state & CIFS_CACHE_READ_FLG) == 0)
4152                 *purge_cache = true;
4153         else if (old_state == new_state && (epoch - old_epoch > 1))
4154                 *purge_cache = true;
4155 }
4156
4157 static void
4158 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4159                       unsigned int epoch, bool *purge_cache)
4160 {
4161         oplock &= 0xFF;
4162         cinode->lease_granted = false;
4163         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4164                 return;
4165         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4166                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4167                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4168                          &cinode->vfs_inode);
4169         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4170                 cinode->oplock = CIFS_CACHE_RW_FLG;
4171                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4172                          &cinode->vfs_inode);
4173         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4174                 cinode->oplock = CIFS_CACHE_READ_FLG;
4175                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4176                          &cinode->vfs_inode);
4177         } else
4178                 cinode->oplock = 0;
4179 }
4180
4181 static void
4182 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4183                        unsigned int epoch, bool *purge_cache)
4184 {
4185         char message[5] = {0};
4186         unsigned int new_oplock = 0;
4187
4188         oplock &= 0xFF;
4189         cinode->lease_granted = true;
4190         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4191                 return;
4192
4193         /* Check if the server granted an oplock rather than a lease */
4194         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4195                 return smb2_set_oplock_level(cinode, oplock, epoch,
4196                                              purge_cache);
4197
4198         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4199                 new_oplock |= CIFS_CACHE_READ_FLG;
4200                 strcat(message, "R");
4201         }
4202         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4203                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4204                 strcat(message, "H");
4205         }
4206         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4207                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4208                 strcat(message, "W");
4209         }
4210         if (!new_oplock)
4211                 strncpy(message, "None", sizeof(message));
4212
4213         cinode->oplock = new_oplock;
4214         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4215                  &cinode->vfs_inode);
4216 }
4217
4218 static void
4219 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4220                       unsigned int epoch, bool *purge_cache)
4221 {
4222         unsigned int old_oplock = cinode->oplock;
4223
4224         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4225
4226         if (purge_cache) {
4227                 *purge_cache = false;
4228                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4229                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4230                             (epoch - cinode->epoch > 0))
4231                                 *purge_cache = true;
4232                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4233                                  (epoch - cinode->epoch > 1))
4234                                 *purge_cache = true;
4235                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4236                                  (epoch - cinode->epoch > 1))
4237                                 *purge_cache = true;
4238                         else if (cinode->oplock == 0 &&
4239                                  (epoch - cinode->epoch > 0))
4240                                 *purge_cache = true;
4241                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4242                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4243                             (epoch - cinode->epoch > 0))
4244                                 *purge_cache = true;
4245                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4246                                  (epoch - cinode->epoch > 1))
4247                                 *purge_cache = true;
4248                 }
4249                 cinode->epoch = epoch;
4250         }
4251 }
4252
4253 static bool
4254 smb2_is_read_op(__u32 oplock)
4255 {
4256         return oplock == SMB2_OPLOCK_LEVEL_II;
4257 }
4258
4259 static bool
4260 smb21_is_read_op(__u32 oplock)
4261 {
4262         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4263                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4264 }
4265
4266 static __le32
4267 map_oplock_to_lease(u8 oplock)
4268 {
4269         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4270                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
4271         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4272                 return SMB2_LEASE_READ_CACHING;
4273         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4274                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
4275                        SMB2_LEASE_WRITE_CACHING;
4276         return 0;
4277 }
4278
4279 static char *
4280 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4281 {
4282         struct create_lease *buf;
4283
4284         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4285         if (!buf)
4286                 return NULL;
4287
4288         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4289         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4290
4291         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4292                                         (struct create_lease, lcontext));
4293         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4294         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4295                                 (struct create_lease, Name));
4296         buf->ccontext.NameLength = cpu_to_le16(4);
4297         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4298         buf->Name[0] = 'R';
4299         buf->Name[1] = 'q';
4300         buf->Name[2] = 'L';
4301         buf->Name[3] = 's';
4302         return (char *)buf;
4303 }
4304
4305 static char *
4306 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4307 {
4308         struct create_lease_v2 *buf;
4309
4310         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4311         if (!buf)
4312                 return NULL;
4313
4314         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4315         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4316
4317         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4318                                         (struct create_lease_v2, lcontext));
4319         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4320         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4321                                 (struct create_lease_v2, Name));
4322         buf->ccontext.NameLength = cpu_to_le16(4);
4323         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4324         buf->Name[0] = 'R';
4325         buf->Name[1] = 'q';
4326         buf->Name[2] = 'L';
4327         buf->Name[3] = 's';
4328         return (char *)buf;
4329 }
4330
4331 static __u8
4332 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4333 {
4334         struct create_lease *lc = (struct create_lease *)buf;
4335
4336         *epoch = 0; /* not used */
4337         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4338                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4339         return le32_to_cpu(lc->lcontext.LeaseState);
4340 }
4341
4342 static __u8
4343 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4344 {
4345         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4346
4347         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4348         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4349                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4350         if (lease_key)
4351                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4352         return le32_to_cpu(lc->lcontext.LeaseState);
4353 }
4354
4355 static unsigned int
4356 smb2_wp_retry_size(struct inode *inode)
4357 {
4358         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4359                      SMB2_MAX_BUFFER_SIZE);
4360 }
4361
4362 static bool
4363 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4364 {
4365         return !cfile->invalidHandle;
4366 }
4367
4368 static void
4369 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4370                    struct smb_rqst *old_rq, __le16 cipher_type)
4371 {
4372         struct smb2_sync_hdr *shdr =
4373                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
4374
4375         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4376         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4377         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4378         tr_hdr->Flags = cpu_to_le16(0x01);
4379         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4380             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4381                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4382         else
4383                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4384         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4385 }
4386
4387 /* We can not use the normal sg_set_buf() as we will sometimes pass a
4388  * stack object as buf.
4389  */
4390 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
4391                                    unsigned int buflen)
4392 {
4393         void *addr;
4394         /*
4395          * VMAP_STACK (at least) puts stack into the vmalloc address space
4396          */
4397         if (is_vmalloc_addr(buf))
4398                 addr = vmalloc_to_page(buf);
4399         else
4400                 addr = virt_to_page(buf);
4401         sg_set_page(sg, addr, buflen, offset_in_page(buf));
4402 }
4403
4404 /* Assumes the first rqst has a transform header as the first iov.
4405  * I.e.
4406  * rqst[0].rq_iov[0]  is transform header
4407  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4408  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4409  */
4410 static struct scatterlist *
4411 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
4412 {
4413         unsigned int sg_len;
4414         struct scatterlist *sg;
4415         unsigned int i;
4416         unsigned int j;
4417         unsigned int idx = 0;
4418         int skip;
4419
4420         sg_len = 1;
4421         for (i = 0; i < num_rqst; i++)
4422                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
4423
4424         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
4425         if (!sg)
4426                 return NULL;
4427
4428         sg_init_table(sg, sg_len);
4429         for (i = 0; i < num_rqst; i++) {
4430                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4431                         /*
4432                          * The first rqst has a transform header where the
4433                          * first 20 bytes are not part of the encrypted blob
4434                          */
4435                         skip = (i == 0) && (j == 0) ? 20 : 0;
4436                         smb2_sg_set_buf(&sg[idx++],
4437                                         rqst[i].rq_iov[j].iov_base + skip,
4438                                         rqst[i].rq_iov[j].iov_len - skip);
4439                         }
4440
4441                 for (j = 0; j < rqst[i].rq_npages; j++) {
4442                         unsigned int len, offset;
4443
4444                         rqst_page_get_length(&rqst[i], j, &len, &offset);
4445                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
4446                 }
4447         }
4448         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
4449         return sg;
4450 }
4451
4452 static int
4453 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4454 {
4455         struct cifs_ses *ses;
4456         u8 *ses_enc_key;
4457
4458         spin_lock(&cifs_tcp_ses_lock);
4459         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4460                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4461                         if (ses->Suid == ses_id) {
4462                                 ses_enc_key = enc ? ses->smb3encryptionkey :
4463                                         ses->smb3decryptionkey;
4464                                 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4465                                 spin_unlock(&cifs_tcp_ses_lock);
4466                                 return 0;
4467                         }
4468                 }
4469         }
4470         spin_unlock(&cifs_tcp_ses_lock);
4471
4472         return -EAGAIN;
4473 }
4474 /*
4475  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4476  * iov[0]   - transform header (associate data),
4477  * iov[1-N] - SMB2 header and pages - data to encrypt.
4478  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4479  * untouched.
4480  */
4481 static int
4482 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4483               struct smb_rqst *rqst, int enc)
4484 {
4485         struct smb2_transform_hdr *tr_hdr =
4486                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4487         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4488         int rc = 0;
4489         struct scatterlist *sg;
4490         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4491         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4492         struct aead_request *req;
4493         char *iv;
4494         unsigned int iv_len;
4495         DECLARE_CRYPTO_WAIT(wait);
4496         struct crypto_aead *tfm;
4497         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4498
4499         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
4500         if (rc) {
4501                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4502                          enc ? "en" : "de");
4503                 return rc;
4504         }
4505
4506         rc = smb3_crypto_aead_allocate(server);
4507         if (rc) {
4508                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4509                 return rc;
4510         }
4511
4512         tfm = enc ? server->secmech.ccmaesencrypt :
4513                                                 server->secmech.ccmaesdecrypt;
4514
4515         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4516                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4517                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4518         else
4519                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4520
4521         if (rc) {
4522                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4523                 return rc;
4524         }
4525
4526         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4527         if (rc) {
4528                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4529                 return rc;
4530         }
4531
4532         req = aead_request_alloc(tfm, GFP_KERNEL);
4533         if (!req) {
4534                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
4535                 return -ENOMEM;
4536         }
4537
4538         if (!enc) {
4539                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4540                 crypt_len += SMB2_SIGNATURE_SIZE;
4541         }
4542
4543         sg = init_sg(num_rqst, rqst, sign);
4544         if (!sg) {
4545                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
4546                 rc = -ENOMEM;
4547                 goto free_req;
4548         }
4549
4550         iv_len = crypto_aead_ivsize(tfm);
4551         iv = kzalloc(iv_len, GFP_KERNEL);
4552         if (!iv) {
4553                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
4554                 rc = -ENOMEM;
4555                 goto free_sg;
4556         }
4557
4558         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4559             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4560                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4561         else {
4562                 iv[0] = 3;
4563                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4564         }
4565
4566         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4567         aead_request_set_ad(req, assoc_data_len);
4568
4569         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4570                                   crypto_req_done, &wait);
4571
4572         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4573                                 : crypto_aead_decrypt(req), &wait);
4574
4575         if (!rc && enc)
4576                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4577
4578         kfree(iv);
4579 free_sg:
4580         kfree(sg);
4581 free_req:
4582         kfree(req);
4583         return rc;
4584 }
4585
4586 void
4587 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4588 {
4589         int i, j;
4590
4591         for (i = 0; i < num_rqst; i++) {
4592                 if (rqst[i].rq_pages) {
4593                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4594                                 put_page(rqst[i].rq_pages[j]);
4595                         kfree(rqst[i].rq_pages);
4596                 }
4597         }
4598 }
4599
4600 /*
4601  * This function will initialize new_rq and encrypt the content.
4602  * The first entry, new_rq[0], only contains a single iov which contains
4603  * a smb2_transform_hdr and is pre-allocated by the caller.
4604  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4605  *
4606  * The end result is an array of smb_rqst structures where the first structure
4607  * only contains a single iov for the transform header which we then can pass
4608  * to crypt_message().
4609  *
4610  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4611  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4612  */
4613 static int
4614 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4615                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4616 {
4617         struct page **pages;
4618         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4619         unsigned int npages;
4620         unsigned int orig_len = 0;
4621         int i, j;
4622         int rc = -ENOMEM;
4623
4624         for (i = 1; i < num_rqst; i++) {
4625                 npages = old_rq[i - 1].rq_npages;
4626                 pages = kmalloc_array(npages, sizeof(struct page *),
4627                                       GFP_KERNEL);
4628                 if (!pages)
4629                         goto err_free;
4630
4631                 new_rq[i].rq_pages = pages;
4632                 new_rq[i].rq_npages = npages;
4633                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4634                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4635                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4636                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4637                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4638
4639                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4640
4641                 for (j = 0; j < npages; j++) {
4642                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4643                         if (!pages[j])
4644                                 goto err_free;
4645                 }
4646
4647                 /* copy pages form the old */
4648                 for (j = 0; j < npages; j++) {
4649                         char *dst, *src;
4650                         unsigned int offset, len;
4651
4652                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4653
4654                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4655                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4656
4657                         memcpy(dst, src, len);
4658                         kunmap(new_rq[i].rq_pages[j]);
4659                         kunmap(old_rq[i - 1].rq_pages[j]);
4660                 }
4661         }
4662
4663         /* fill the 1st iov with a transform header */
4664         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4665
4666         rc = crypt_message(server, num_rqst, new_rq, 1);
4667         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4668         if (rc)
4669                 goto err_free;
4670
4671         return rc;
4672
4673 err_free:
4674         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4675         return rc;
4676 }
4677
4678 static int
4679 smb3_is_transform_hdr(void *buf)
4680 {
4681         struct smb2_transform_hdr *trhdr = buf;
4682
4683         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4684 }
4685
4686 static int
4687 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4688                  unsigned int buf_data_size, struct page **pages,
4689                  unsigned int npages, unsigned int page_data_size,
4690                  bool is_offloaded)
4691 {
4692         struct kvec iov[2];
4693         struct smb_rqst rqst = {NULL};
4694         int rc;
4695
4696         iov[0].iov_base = buf;
4697         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4698         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4699         iov[1].iov_len = buf_data_size;
4700
4701         rqst.rq_iov = iov;
4702         rqst.rq_nvec = 2;
4703         rqst.rq_pages = pages;
4704         rqst.rq_npages = npages;
4705         rqst.rq_pagesz = PAGE_SIZE;
4706         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4707
4708         rc = crypt_message(server, 1, &rqst, 0);
4709         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4710
4711         if (rc)
4712                 return rc;
4713
4714         memmove(buf, iov[1].iov_base, buf_data_size);
4715
4716         if (!is_offloaded)
4717                 server->total_read = buf_data_size + page_data_size;
4718
4719         return rc;
4720 }
4721
4722 static int
4723 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4724                      unsigned int npages, unsigned int len)
4725 {
4726         int i;
4727         int length;
4728
4729         for (i = 0; i < npages; i++) {
4730                 struct page *page = pages[i];
4731                 size_t n;
4732
4733                 n = len;
4734                 if (len >= PAGE_SIZE) {
4735                         /* enough data to fill the page */
4736                         n = PAGE_SIZE;
4737                         len -= n;
4738                 } else {
4739                         zero_user(page, len, PAGE_SIZE - len);
4740                         len = 0;
4741                 }
4742                 length = cifs_read_page_from_socket(server, page, 0, n);
4743                 if (length < 0)
4744                         return length;
4745                 server->total_read += length;
4746         }
4747
4748         return 0;
4749 }
4750
4751 static int
4752 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4753                unsigned int cur_off, struct bio_vec **page_vec)
4754 {
4755         struct bio_vec *bvec;
4756         int i;
4757
4758         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4759         if (!bvec)
4760                 return -ENOMEM;
4761
4762         for (i = 0; i < npages; i++) {
4763                 bvec[i].bv_page = pages[i];
4764                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4765                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4766                 data_size -= bvec[i].bv_len;
4767         }
4768
4769         if (data_size != 0) {
4770                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4771                 kfree(bvec);
4772                 return -EIO;
4773         }
4774
4775         *page_vec = bvec;
4776         return 0;
4777 }
4778
4779 static int
4780 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4781                  char *buf, unsigned int buf_len, struct page **pages,
4782                  unsigned int npages, unsigned int page_data_size,
4783                  bool is_offloaded)
4784 {
4785         unsigned int data_offset;
4786         unsigned int data_len;
4787         unsigned int cur_off;
4788         unsigned int cur_page_idx;
4789         unsigned int pad_len;
4790         struct cifs_readdata *rdata = mid->callback_data;
4791         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4792         struct bio_vec *bvec = NULL;
4793         struct iov_iter iter;
4794         struct kvec iov;
4795         int length;
4796         bool use_rdma_mr = false;
4797
4798         if (shdr->Command != SMB2_READ) {
4799                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4800                 return -ENOTSUPP;
4801         }
4802
4803         if (server->ops->is_session_expired &&
4804             server->ops->is_session_expired(buf)) {
4805                 if (!is_offloaded)
4806                         cifs_reconnect(server);
4807                 return -1;
4808         }
4809
4810         if (server->ops->is_status_pending &&
4811                         server->ops->is_status_pending(buf, server))
4812                 return -1;
4813
4814         /* set up first two iov to get credits */
4815         rdata->iov[0].iov_base = buf;
4816         rdata->iov[0].iov_len = 0;
4817         rdata->iov[1].iov_base = buf;
4818         rdata->iov[1].iov_len =
4819                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4820         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4821                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4822         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4823                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4824
4825         rdata->result = server->ops->map_error(buf, true);
4826         if (rdata->result != 0) {
4827                 cifs_dbg(FYI, "%s: server returned error %d\n",
4828                          __func__, rdata->result);
4829                 /* normal error on read response */
4830                 if (is_offloaded)
4831                         mid->mid_state = MID_RESPONSE_RECEIVED;
4832                 else
4833                         dequeue_mid(mid, false);
4834                 return 0;
4835         }
4836
4837         data_offset = server->ops->read_data_offset(buf);
4838 #ifdef CONFIG_CIFS_SMB_DIRECT
4839         use_rdma_mr = rdata->mr;
4840 #endif
4841         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4842
4843         if (data_offset < server->vals->read_rsp_size) {
4844                 /*
4845                  * win2k8 sometimes sends an offset of 0 when the read
4846                  * is beyond the EOF. Treat it as if the data starts just after
4847                  * the header.
4848                  */
4849                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4850                          __func__, data_offset);
4851                 data_offset = server->vals->read_rsp_size;
4852         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4853                 /* data_offset is beyond the end of smallbuf */
4854                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4855                          __func__, data_offset);
4856                 rdata->result = -EIO;
4857                 if (is_offloaded)
4858                         mid->mid_state = MID_RESPONSE_MALFORMED;
4859                 else
4860                         dequeue_mid(mid, rdata->result);
4861                 return 0;
4862         }
4863
4864         pad_len = data_offset - server->vals->read_rsp_size;
4865
4866         if (buf_len <= data_offset) {
4867                 /* read response payload is in pages */
4868                 cur_page_idx = pad_len / PAGE_SIZE;
4869                 cur_off = pad_len % PAGE_SIZE;
4870
4871                 if (cur_page_idx != 0) {
4872                         /* data offset is beyond the 1st page of response */
4873                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4874                                  __func__, data_offset);
4875                         rdata->result = -EIO;
4876                         if (is_offloaded)
4877                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4878                         else
4879                                 dequeue_mid(mid, rdata->result);
4880                         return 0;
4881                 }
4882
4883                 if (data_len > page_data_size - pad_len) {
4884                         /* data_len is corrupt -- discard frame */
4885                         rdata->result = -EIO;
4886                         if (is_offloaded)
4887                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4888                         else
4889                                 dequeue_mid(mid, rdata->result);
4890                         return 0;
4891                 }
4892
4893                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4894                                                cur_off, &bvec);
4895                 if (rdata->result != 0) {
4896                         if (is_offloaded)
4897                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4898                         else
4899                                 dequeue_mid(mid, rdata->result);
4900                         return 0;
4901                 }
4902
4903                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4904         } else if (buf_len >= data_offset + data_len) {
4905                 /* read response payload is in buf */
4906                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4907                 iov.iov_base = buf + data_offset;
4908                 iov.iov_len = data_len;
4909                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4910         } else {
4911                 /* read response payload cannot be in both buf and pages */
4912                 WARN_ONCE(1, "buf can not contain only a part of read data");
4913                 rdata->result = -EIO;
4914                 if (is_offloaded)
4915                         mid->mid_state = MID_RESPONSE_MALFORMED;
4916                 else
4917                         dequeue_mid(mid, rdata->result);
4918                 return 0;
4919         }
4920
4921         length = rdata->copy_into_pages(server, rdata, &iter);
4922
4923         kfree(bvec);
4924
4925         if (length < 0)
4926                 return length;
4927
4928         if (is_offloaded)
4929                 mid->mid_state = MID_RESPONSE_RECEIVED;
4930         else
4931                 dequeue_mid(mid, false);
4932         return length;
4933 }
4934
4935 struct smb2_decrypt_work {
4936         struct work_struct decrypt;
4937         struct TCP_Server_Info *server;
4938         struct page **ppages;
4939         char *buf;
4940         unsigned int npages;
4941         unsigned int len;
4942 };
4943
4944
4945 static void smb2_decrypt_offload(struct work_struct *work)
4946 {
4947         struct smb2_decrypt_work *dw = container_of(work,
4948                                 struct smb2_decrypt_work, decrypt);
4949         int i, rc;
4950         struct mid_q_entry *mid;
4951
4952         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4953                               dw->ppages, dw->npages, dw->len, true);
4954         if (rc) {
4955                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4956                 goto free_pages;
4957         }
4958
4959         dw->server->lstrp = jiffies;
4960         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4961         if (mid == NULL)
4962                 cifs_dbg(FYI, "mid not found\n");
4963         else {
4964                 mid->decrypted = true;
4965                 rc = handle_read_data(dw->server, mid, dw->buf,
4966                                       dw->server->vals->read_rsp_size,
4967                                       dw->ppages, dw->npages, dw->len,
4968                                       true);
4969                 if (rc >= 0) {
4970 #ifdef CONFIG_CIFS_STATS2
4971                         mid->when_received = jiffies;
4972 #endif
4973                         if (dw->server->ops->is_network_name_deleted)
4974                                 dw->server->ops->is_network_name_deleted(dw->buf,
4975                                                                          dw->server);
4976
4977                         mid->callback(mid);
4978                 } else {
4979                         spin_lock(&GlobalMid_Lock);
4980                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4981                                 mid->mid_state = MID_RETRY_NEEDED;
4982                                 spin_unlock(&GlobalMid_Lock);
4983                                 mid->callback(mid);
4984                         } else {
4985                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4986                                 mid->mid_flags &= ~(MID_DELETED);
4987                                 list_add_tail(&mid->qhead,
4988                                         &dw->server->pending_mid_q);
4989                                 spin_unlock(&GlobalMid_Lock);
4990                         }
4991                 }
4992                 cifs_mid_q_entry_release(mid);
4993         }
4994
4995 free_pages:
4996         for (i = dw->npages-1; i >= 0; i--)
4997                 put_page(dw->ppages[i]);
4998
4999         kfree(dw->ppages);
5000         cifs_small_buf_release(dw->buf);
5001         kfree(dw);
5002 }
5003
5004
5005 static int
5006 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
5007                        int *num_mids)
5008 {
5009         char *buf = server->smallbuf;
5010         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5011         unsigned int npages;
5012         struct page **pages;
5013         unsigned int len;
5014         unsigned int buflen = server->pdu_size;
5015         int rc;
5016         int i = 0;
5017         struct smb2_decrypt_work *dw;
5018
5019         *num_mids = 1;
5020         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
5021                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
5022
5023         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
5024         if (rc < 0)
5025                 return rc;
5026         server->total_read += rc;
5027
5028         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
5029                 server->vals->read_rsp_size;
5030         npages = DIV_ROUND_UP(len, PAGE_SIZE);
5031
5032         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
5033         if (!pages) {
5034                 rc = -ENOMEM;
5035                 goto discard_data;
5036         }
5037
5038         for (; i < npages; i++) {
5039                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
5040                 if (!pages[i]) {
5041                         rc = -ENOMEM;
5042                         goto discard_data;
5043                 }
5044         }
5045
5046         /* read read data into pages */
5047         rc = read_data_into_pages(server, pages, npages, len);
5048         if (rc)
5049                 goto free_pages;
5050
5051         rc = cifs_discard_remaining_data(server);
5052         if (rc)
5053                 goto free_pages;
5054
5055         /*
5056          * For large reads, offload to different thread for better performance,
5057          * use more cores decrypting which can be expensive
5058          */
5059
5060         if ((server->min_offload) && (server->in_flight > 1) &&
5061             (server->pdu_size >= server->min_offload)) {
5062                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
5063                 if (dw == NULL)
5064                         goto non_offloaded_decrypt;
5065
5066                 dw->buf = server->smallbuf;
5067                 server->smallbuf = (char *)cifs_small_buf_get();
5068
5069                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
5070
5071                 dw->npages = npages;
5072                 dw->server = server;
5073                 dw->ppages = pages;
5074                 dw->len = len;
5075                 queue_work(decrypt_wq, &dw->decrypt);
5076                 *num_mids = 0; /* worker thread takes care of finding mid */
5077                 return -1;
5078         }
5079
5080 non_offloaded_decrypt:
5081         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
5082                               pages, npages, len, false);
5083         if (rc)
5084                 goto free_pages;
5085
5086         *mid = smb2_find_mid(server, buf);
5087         if (*mid == NULL)
5088                 cifs_dbg(FYI, "mid not found\n");
5089         else {
5090                 cifs_dbg(FYI, "mid found\n");
5091                 (*mid)->decrypted = true;
5092                 rc = handle_read_data(server, *mid, buf,
5093                                       server->vals->read_rsp_size,
5094                                       pages, npages, len, false);
5095                 if (rc >= 0) {
5096                         if (server->ops->is_network_name_deleted) {
5097                                 server->ops->is_network_name_deleted(buf,
5098                                                                 server);
5099                         }
5100                 }
5101         }
5102
5103 free_pages:
5104         for (i = i - 1; i >= 0; i--)
5105                 put_page(pages[i]);
5106         kfree(pages);
5107         return rc;
5108 discard_data:
5109         cifs_discard_remaining_data(server);
5110         goto free_pages;
5111 }
5112
5113 static int
5114 receive_encrypted_standard(struct TCP_Server_Info *server,
5115                            struct mid_q_entry **mids, char **bufs,
5116                            int *num_mids)
5117 {
5118         int ret, length;
5119         char *buf = server->smallbuf;
5120         struct smb2_sync_hdr *shdr;
5121         unsigned int pdu_length = server->pdu_size;
5122         unsigned int buf_size;
5123         struct mid_q_entry *mid_entry;
5124         int next_is_large;
5125         char *next_buffer = NULL;
5126
5127         *num_mids = 0;
5128
5129         /* switch to large buffer if too big for a small one */
5130         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
5131                 server->large_buf = true;
5132                 memcpy(server->bigbuf, buf, server->total_read);
5133                 buf = server->bigbuf;
5134         }
5135
5136         /* now read the rest */
5137         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
5138                                 pdu_length - HEADER_SIZE(server) + 1);
5139         if (length < 0)
5140                 return length;
5141         server->total_read += length;
5142
5143         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
5144         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
5145         if (length)
5146                 return length;
5147
5148         next_is_large = server->large_buf;
5149 one_more:
5150         shdr = (struct smb2_sync_hdr *)buf;
5151         if (shdr->NextCommand) {
5152                 if (next_is_large)
5153                         next_buffer = (char *)cifs_buf_get();
5154                 else
5155                         next_buffer = (char *)cifs_small_buf_get();
5156                 memcpy(next_buffer,
5157                        buf + le32_to_cpu(shdr->NextCommand),
5158                        pdu_length - le32_to_cpu(shdr->NextCommand));
5159         }
5160
5161         mid_entry = smb2_find_mid(server, buf);
5162         if (mid_entry == NULL)
5163                 cifs_dbg(FYI, "mid not found\n");
5164         else {
5165                 cifs_dbg(FYI, "mid found\n");
5166                 mid_entry->decrypted = true;
5167                 mid_entry->resp_buf_size = server->pdu_size;
5168         }
5169
5170         if (*num_mids >= MAX_COMPOUND) {
5171                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5172                 return -1;
5173         }
5174         bufs[*num_mids] = buf;
5175         mids[(*num_mids)++] = mid_entry;
5176
5177         if (mid_entry && mid_entry->handle)
5178                 ret = mid_entry->handle(server, mid_entry);
5179         else
5180                 ret = cifs_handle_standard(server, mid_entry);
5181
5182         if (ret == 0 && shdr->NextCommand) {
5183                 pdu_length -= le32_to_cpu(shdr->NextCommand);
5184                 server->large_buf = next_is_large;
5185                 if (next_is_large)
5186                         server->bigbuf = buf = next_buffer;
5187                 else
5188                         server->smallbuf = buf = next_buffer;
5189                 goto one_more;
5190         } else if (ret != 0) {
5191                 /*
5192                  * ret != 0 here means that we didn't get to handle_mid() thus
5193                  * server->smallbuf and server->bigbuf are still valid. We need
5194                  * to free next_buffer because it is not going to be used
5195                  * anywhere.
5196                  */
5197                 if (next_is_large)
5198                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5199                 else
5200                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5201         }
5202
5203         return ret;
5204 }
5205
5206 static int
5207 smb3_receive_transform(struct TCP_Server_Info *server,
5208                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5209 {
5210         char *buf = server->smallbuf;
5211         unsigned int pdu_length = server->pdu_size;
5212         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5213         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5214
5215         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5216                                                 sizeof(struct smb2_sync_hdr)) {
5217                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5218                          pdu_length);
5219                 cifs_reconnect(server);
5220                 return -ECONNABORTED;
5221         }
5222
5223         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5224                 cifs_server_dbg(VFS, "Transform message is broken\n");
5225                 cifs_reconnect(server);
5226                 return -ECONNABORTED;
5227         }
5228
5229         /* TODO: add support for compounds containing READ. */
5230         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5231                 return receive_encrypted_read(server, &mids[0], num_mids);
5232         }
5233
5234         return receive_encrypted_standard(server, mids, bufs, num_mids);
5235 }
5236
5237 int
5238 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5239 {
5240         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5241
5242         return handle_read_data(server, mid, buf, server->pdu_size,
5243                                 NULL, 0, 0, false);
5244 }
5245
5246 static int
5247 smb2_next_header(char *buf)
5248 {
5249         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
5250         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5251
5252         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5253                 return sizeof(struct smb2_transform_hdr) +
5254                   le32_to_cpu(t_hdr->OriginalMessageSize);
5255
5256         return le32_to_cpu(hdr->NextCommand);
5257 }
5258
5259 static int
5260 smb2_make_node(unsigned int xid, struct inode *inode,
5261                struct dentry *dentry, struct cifs_tcon *tcon,
5262                const char *full_path, umode_t mode, dev_t dev)
5263 {
5264         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5265         int rc = -EPERM;
5266         FILE_ALL_INFO *buf = NULL;
5267         struct cifs_io_parms io_parms = {0};
5268         __u32 oplock = 0;
5269         struct cifs_fid fid;
5270         struct cifs_open_parms oparms;
5271         unsigned int bytes_written;
5272         struct win_dev *pdev;
5273         struct kvec iov[2];
5274
5275         /*
5276          * Check if mounted with mount parm 'sfu' mount parm.
5277          * SFU emulation should work with all servers, but only
5278          * supports block and char device (no socket & fifo),
5279          * and was used by default in earlier versions of Windows
5280          */
5281         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5282                 goto out;
5283
5284         /*
5285          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5286          * their current NFS server) uses this approach to expose special files
5287          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5288          */
5289
5290         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5291                 goto out;
5292
5293         cifs_dbg(FYI, "sfu compat create special file\n");
5294
5295         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5296         if (buf == NULL) {
5297                 rc = -ENOMEM;
5298                 goto out;
5299         }
5300
5301         oparms.tcon = tcon;
5302         oparms.cifs_sb = cifs_sb;
5303         oparms.desired_access = GENERIC_WRITE;
5304         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5305                                                     CREATE_OPTION_SPECIAL);
5306         oparms.disposition = FILE_CREATE;
5307         oparms.path = full_path;
5308         oparms.fid = &fid;
5309         oparms.reconnect = false;
5310
5311         if (tcon->ses->server->oplocks)
5312                 oplock = REQ_OPLOCK;
5313         else
5314                 oplock = 0;
5315         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5316         if (rc)
5317                 goto out;
5318
5319         /*
5320          * BB Do not bother to decode buf since no local inode yet to put
5321          * timestamps in, but we can reuse it safely.
5322          */
5323
5324         pdev = (struct win_dev *)buf;
5325         io_parms.pid = current->tgid;
5326         io_parms.tcon = tcon;
5327         io_parms.offset = 0;
5328         io_parms.length = sizeof(struct win_dev);
5329         iov[1].iov_base = buf;
5330         iov[1].iov_len = sizeof(struct win_dev);
5331         if (S_ISCHR(mode)) {
5332                 memcpy(pdev->type, "IntxCHR", 8);
5333                 pdev->major = cpu_to_le64(MAJOR(dev));
5334                 pdev->minor = cpu_to_le64(MINOR(dev));
5335                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5336                                                         &bytes_written, iov, 1);
5337         } else if (S_ISBLK(mode)) {
5338                 memcpy(pdev->type, "IntxBLK", 8);
5339                 pdev->major = cpu_to_le64(MAJOR(dev));
5340                 pdev->minor = cpu_to_le64(MINOR(dev));
5341                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5342                                                         &bytes_written, iov, 1);
5343         }
5344         tcon->ses->server->ops->close(xid, tcon, &fid);
5345         d_drop(dentry);
5346
5347         /* FIXME: add code here to set EAs */
5348 out:
5349         kfree(buf);
5350         return rc;
5351 }
5352
5353
5354 struct smb_version_operations smb20_operations = {
5355         .compare_fids = smb2_compare_fids,
5356         .setup_request = smb2_setup_request,
5357         .setup_async_request = smb2_setup_async_request,
5358         .check_receive = smb2_check_receive,
5359         .add_credits = smb2_add_credits,
5360         .set_credits = smb2_set_credits,
5361         .get_credits_field = smb2_get_credits_field,
5362         .get_credits = smb2_get_credits,
5363         .wait_mtu_credits = cifs_wait_mtu_credits,
5364         .get_next_mid = smb2_get_next_mid,
5365         .revert_current_mid = smb2_revert_current_mid,
5366         .read_data_offset = smb2_read_data_offset,
5367         .read_data_length = smb2_read_data_length,
5368         .map_error = map_smb2_to_linux_error,
5369         .find_mid = smb2_find_mid,
5370         .check_message = smb2_check_message,
5371         .dump_detail = smb2_dump_detail,
5372         .clear_stats = smb2_clear_stats,
5373         .print_stats = smb2_print_stats,
5374         .is_oplock_break = smb2_is_valid_oplock_break,
5375         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5376         .downgrade_oplock = smb2_downgrade_oplock,
5377         .need_neg = smb2_need_neg,
5378         .negotiate = smb2_negotiate,
5379         .negotiate_wsize = smb2_negotiate_wsize,
5380         .negotiate_rsize = smb2_negotiate_rsize,
5381         .sess_setup = SMB2_sess_setup,
5382         .logoff = SMB2_logoff,
5383         .tree_connect = SMB2_tcon,
5384         .tree_disconnect = SMB2_tdis,
5385         .qfs_tcon = smb2_qfs_tcon,
5386         .is_path_accessible = smb2_is_path_accessible,
5387         .can_echo = smb2_can_echo,
5388         .echo = SMB2_echo,
5389         .query_path_info = smb2_query_path_info,
5390         .get_srv_inum = smb2_get_srv_inum,
5391         .query_file_info = smb2_query_file_info,
5392         .set_path_size = smb2_set_path_size,
5393         .set_file_size = smb2_set_file_size,
5394         .set_file_info = smb2_set_file_info,
5395         .set_compression = smb2_set_compression,
5396         .mkdir = smb2_mkdir,
5397         .mkdir_setinfo = smb2_mkdir_setinfo,
5398         .rmdir = smb2_rmdir,
5399         .unlink = smb2_unlink,
5400         .rename = smb2_rename_path,
5401         .create_hardlink = smb2_create_hardlink,
5402         .query_symlink = smb2_query_symlink,
5403         .query_mf_symlink = smb3_query_mf_symlink,
5404         .create_mf_symlink = smb3_create_mf_symlink,
5405         .open = smb2_open_file,
5406         .set_fid = smb2_set_fid,
5407         .close = smb2_close_file,
5408         .flush = smb2_flush_file,
5409         .async_readv = smb2_async_readv,
5410         .async_writev = smb2_async_writev,
5411         .sync_read = smb2_sync_read,
5412         .sync_write = smb2_sync_write,
5413         .query_dir_first = smb2_query_dir_first,
5414         .query_dir_next = smb2_query_dir_next,
5415         .close_dir = smb2_close_dir,
5416         .calc_smb_size = smb2_calc_size,
5417         .is_status_pending = smb2_is_status_pending,
5418         .is_session_expired = smb2_is_session_expired,
5419         .oplock_response = smb2_oplock_response,
5420         .queryfs = smb2_queryfs,
5421         .mand_lock = smb2_mand_lock,
5422         .mand_unlock_range = smb2_unlock_range,
5423         .push_mand_locks = smb2_push_mandatory_locks,
5424         .get_lease_key = smb2_get_lease_key,
5425         .set_lease_key = smb2_set_lease_key,
5426         .new_lease_key = smb2_new_lease_key,
5427         .calc_signature = smb2_calc_signature,
5428         .is_read_op = smb2_is_read_op,
5429         .set_oplock_level = smb2_set_oplock_level,
5430         .create_lease_buf = smb2_create_lease_buf,
5431         .parse_lease_buf = smb2_parse_lease_buf,
5432         .copychunk_range = smb2_copychunk_range,
5433         .wp_retry_size = smb2_wp_retry_size,
5434         .dir_needs_close = smb2_dir_needs_close,
5435         .get_dfs_refer = smb2_get_dfs_refer,
5436         .select_sectype = smb2_select_sectype,
5437 #ifdef CONFIG_CIFS_XATTR
5438         .query_all_EAs = smb2_query_eas,
5439         .set_EA = smb2_set_ea,
5440 #endif /* CIFS_XATTR */
5441         .get_acl = get_smb2_acl,
5442         .get_acl_by_fid = get_smb2_acl_by_fid,
5443         .set_acl = set_smb2_acl,
5444         .next_header = smb2_next_header,
5445         .ioctl_query_info = smb2_ioctl_query_info,
5446         .make_node = smb2_make_node,
5447         .fiemap = smb3_fiemap,
5448         .llseek = smb3_llseek,
5449         .is_status_io_timeout = smb2_is_status_io_timeout,
5450         .is_network_name_deleted = smb2_is_network_name_deleted,
5451 };
5452
5453 struct smb_version_operations smb21_operations = {
5454         .compare_fids = smb2_compare_fids,
5455         .setup_request = smb2_setup_request,
5456         .setup_async_request = smb2_setup_async_request,
5457         .check_receive = smb2_check_receive,
5458         .add_credits = smb2_add_credits,
5459         .set_credits = smb2_set_credits,
5460         .get_credits_field = smb2_get_credits_field,
5461         .get_credits = smb2_get_credits,
5462         .wait_mtu_credits = smb2_wait_mtu_credits,
5463         .adjust_credits = smb2_adjust_credits,
5464         .get_next_mid = smb2_get_next_mid,
5465         .revert_current_mid = smb2_revert_current_mid,
5466         .read_data_offset = smb2_read_data_offset,
5467         .read_data_length = smb2_read_data_length,
5468         .map_error = map_smb2_to_linux_error,
5469         .find_mid = smb2_find_mid,
5470         .check_message = smb2_check_message,
5471         .dump_detail = smb2_dump_detail,
5472         .clear_stats = smb2_clear_stats,
5473         .print_stats = smb2_print_stats,
5474         .is_oplock_break = smb2_is_valid_oplock_break,
5475         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5476         .downgrade_oplock = smb2_downgrade_oplock,
5477         .need_neg = smb2_need_neg,
5478         .negotiate = smb2_negotiate,
5479         .negotiate_wsize = smb2_negotiate_wsize,
5480         .negotiate_rsize = smb2_negotiate_rsize,
5481         .sess_setup = SMB2_sess_setup,
5482         .logoff = SMB2_logoff,
5483         .tree_connect = SMB2_tcon,
5484         .tree_disconnect = SMB2_tdis,
5485         .qfs_tcon = smb2_qfs_tcon,
5486         .is_path_accessible = smb2_is_path_accessible,
5487         .can_echo = smb2_can_echo,
5488         .echo = SMB2_echo,
5489         .query_path_info = smb2_query_path_info,
5490         .get_srv_inum = smb2_get_srv_inum,
5491         .query_file_info = smb2_query_file_info,
5492         .set_path_size = smb2_set_path_size,
5493         .set_file_size = smb2_set_file_size,
5494         .set_file_info = smb2_set_file_info,
5495         .set_compression = smb2_set_compression,
5496         .mkdir = smb2_mkdir,
5497         .mkdir_setinfo = smb2_mkdir_setinfo,
5498         .rmdir = smb2_rmdir,
5499         .unlink = smb2_unlink,
5500         .rename = smb2_rename_path,
5501         .create_hardlink = smb2_create_hardlink,
5502         .query_symlink = smb2_query_symlink,
5503         .query_mf_symlink = smb3_query_mf_symlink,
5504         .create_mf_symlink = smb3_create_mf_symlink,
5505         .open = smb2_open_file,
5506         .set_fid = smb2_set_fid,
5507         .close = smb2_close_file,
5508         .flush = smb2_flush_file,
5509         .async_readv = smb2_async_readv,
5510         .async_writev = smb2_async_writev,
5511         .sync_read = smb2_sync_read,
5512         .sync_write = smb2_sync_write,
5513         .query_dir_first = smb2_query_dir_first,
5514         .query_dir_next = smb2_query_dir_next,
5515         .close_dir = smb2_close_dir,
5516         .calc_smb_size = smb2_calc_size,
5517         .is_status_pending = smb2_is_status_pending,
5518         .is_session_expired = smb2_is_session_expired,
5519         .oplock_response = smb2_oplock_response,
5520         .queryfs = smb2_queryfs,
5521         .mand_lock = smb2_mand_lock,
5522         .mand_unlock_range = smb2_unlock_range,
5523         .push_mand_locks = smb2_push_mandatory_locks,
5524         .get_lease_key = smb2_get_lease_key,
5525         .set_lease_key = smb2_set_lease_key,
5526         .new_lease_key = smb2_new_lease_key,
5527         .calc_signature = smb2_calc_signature,
5528         .is_read_op = smb21_is_read_op,
5529         .set_oplock_level = smb21_set_oplock_level,
5530         .create_lease_buf = smb2_create_lease_buf,
5531         .parse_lease_buf = smb2_parse_lease_buf,
5532         .copychunk_range = smb2_copychunk_range,
5533         .wp_retry_size = smb2_wp_retry_size,
5534         .dir_needs_close = smb2_dir_needs_close,
5535         .enum_snapshots = smb3_enum_snapshots,
5536         .notify = smb3_notify,
5537         .get_dfs_refer = smb2_get_dfs_refer,
5538         .select_sectype = smb2_select_sectype,
5539 #ifdef CONFIG_CIFS_XATTR
5540         .query_all_EAs = smb2_query_eas,
5541         .set_EA = smb2_set_ea,
5542 #endif /* CIFS_XATTR */
5543         .get_acl = get_smb2_acl,
5544         .get_acl_by_fid = get_smb2_acl_by_fid,
5545         .set_acl = set_smb2_acl,
5546         .next_header = smb2_next_header,
5547         .ioctl_query_info = smb2_ioctl_query_info,
5548         .make_node = smb2_make_node,
5549         .fiemap = smb3_fiemap,
5550         .llseek = smb3_llseek,
5551         .is_status_io_timeout = smb2_is_status_io_timeout,
5552         .is_network_name_deleted = smb2_is_network_name_deleted,
5553 };
5554
5555 struct smb_version_operations smb30_operations = {
5556         .compare_fids = smb2_compare_fids,
5557         .setup_request = smb2_setup_request,
5558         .setup_async_request = smb2_setup_async_request,
5559         .check_receive = smb2_check_receive,
5560         .add_credits = smb2_add_credits,
5561         .set_credits = smb2_set_credits,
5562         .get_credits_field = smb2_get_credits_field,
5563         .get_credits = smb2_get_credits,
5564         .wait_mtu_credits = smb2_wait_mtu_credits,
5565         .adjust_credits = smb2_adjust_credits,
5566         .get_next_mid = smb2_get_next_mid,
5567         .revert_current_mid = smb2_revert_current_mid,
5568         .read_data_offset = smb2_read_data_offset,
5569         .read_data_length = smb2_read_data_length,
5570         .map_error = map_smb2_to_linux_error,
5571         .find_mid = smb2_find_mid,
5572         .check_message = smb2_check_message,
5573         .dump_detail = smb2_dump_detail,
5574         .clear_stats = smb2_clear_stats,
5575         .print_stats = smb2_print_stats,
5576         .dump_share_caps = smb2_dump_share_caps,
5577         .is_oplock_break = smb2_is_valid_oplock_break,
5578         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5579         .downgrade_oplock = smb3_downgrade_oplock,
5580         .need_neg = smb2_need_neg,
5581         .negotiate = smb2_negotiate,
5582         .negotiate_wsize = smb3_negotiate_wsize,
5583         .negotiate_rsize = smb3_negotiate_rsize,
5584         .sess_setup = SMB2_sess_setup,
5585         .logoff = SMB2_logoff,
5586         .tree_connect = SMB2_tcon,
5587         .tree_disconnect = SMB2_tdis,
5588         .qfs_tcon = smb3_qfs_tcon,
5589         .is_path_accessible = smb2_is_path_accessible,
5590         .can_echo = smb2_can_echo,
5591         .echo = SMB2_echo,
5592         .query_path_info = smb2_query_path_info,
5593         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5594         .query_reparse_tag = smb2_query_reparse_tag,
5595         .get_srv_inum = smb2_get_srv_inum,
5596         .query_file_info = smb2_query_file_info,
5597         .set_path_size = smb2_set_path_size,
5598         .set_file_size = smb2_set_file_size,
5599         .set_file_info = smb2_set_file_info,
5600         .set_compression = smb2_set_compression,
5601         .mkdir = smb2_mkdir,
5602         .mkdir_setinfo = smb2_mkdir_setinfo,
5603         .rmdir = smb2_rmdir,
5604         .unlink = smb2_unlink,
5605         .rename = smb2_rename_path,
5606         .create_hardlink = smb2_create_hardlink,
5607         .query_symlink = smb2_query_symlink,
5608         .query_mf_symlink = smb3_query_mf_symlink,
5609         .create_mf_symlink = smb3_create_mf_symlink,
5610         .open = smb2_open_file,
5611         .set_fid = smb2_set_fid,
5612         .close = smb2_close_file,
5613         .close_getattr = smb2_close_getattr,
5614         .flush = smb2_flush_file,
5615         .async_readv = smb2_async_readv,
5616         .async_writev = smb2_async_writev,
5617         .sync_read = smb2_sync_read,
5618         .sync_write = smb2_sync_write,
5619         .query_dir_first = smb2_query_dir_first,
5620         .query_dir_next = smb2_query_dir_next,
5621         .close_dir = smb2_close_dir,
5622         .calc_smb_size = smb2_calc_size,
5623         .is_status_pending = smb2_is_status_pending,
5624         .is_session_expired = smb2_is_session_expired,
5625         .oplock_response = smb2_oplock_response,
5626         .queryfs = smb2_queryfs,
5627         .mand_lock = smb2_mand_lock,
5628         .mand_unlock_range = smb2_unlock_range,
5629         .push_mand_locks = smb2_push_mandatory_locks,
5630         .get_lease_key = smb2_get_lease_key,
5631         .set_lease_key = smb2_set_lease_key,
5632         .new_lease_key = smb2_new_lease_key,
5633         .generate_signingkey = generate_smb30signingkey,
5634         .calc_signature = smb3_calc_signature,
5635         .set_integrity  = smb3_set_integrity,
5636         .is_read_op = smb21_is_read_op,
5637         .set_oplock_level = smb3_set_oplock_level,
5638         .create_lease_buf = smb3_create_lease_buf,
5639         .parse_lease_buf = smb3_parse_lease_buf,
5640         .copychunk_range = smb2_copychunk_range,
5641         .duplicate_extents = smb2_duplicate_extents,
5642         .validate_negotiate = smb3_validate_negotiate,
5643         .wp_retry_size = smb2_wp_retry_size,
5644         .dir_needs_close = smb2_dir_needs_close,
5645         .fallocate = smb3_fallocate,
5646         .enum_snapshots = smb3_enum_snapshots,
5647         .notify = smb3_notify,
5648         .init_transform_rq = smb3_init_transform_rq,
5649         .is_transform_hdr = smb3_is_transform_hdr,
5650         .receive_transform = smb3_receive_transform,
5651         .get_dfs_refer = smb2_get_dfs_refer,
5652         .select_sectype = smb2_select_sectype,
5653 #ifdef CONFIG_CIFS_XATTR
5654         .query_all_EAs = smb2_query_eas,
5655         .set_EA = smb2_set_ea,
5656 #endif /* CIFS_XATTR */
5657         .get_acl = get_smb2_acl,
5658         .get_acl_by_fid = get_smb2_acl_by_fid,
5659         .set_acl = set_smb2_acl,
5660         .next_header = smb2_next_header,
5661         .ioctl_query_info = smb2_ioctl_query_info,
5662         .make_node = smb2_make_node,
5663         .fiemap = smb3_fiemap,
5664         .llseek = smb3_llseek,
5665         .is_status_io_timeout = smb2_is_status_io_timeout,
5666         .is_network_name_deleted = smb2_is_network_name_deleted,
5667 };
5668
5669 struct smb_version_operations smb311_operations = {
5670         .compare_fids = smb2_compare_fids,
5671         .setup_request = smb2_setup_request,
5672         .setup_async_request = smb2_setup_async_request,
5673         .check_receive = smb2_check_receive,
5674         .add_credits = smb2_add_credits,
5675         .set_credits = smb2_set_credits,
5676         .get_credits_field = smb2_get_credits_field,
5677         .get_credits = smb2_get_credits,
5678         .wait_mtu_credits = smb2_wait_mtu_credits,
5679         .adjust_credits = smb2_adjust_credits,
5680         .get_next_mid = smb2_get_next_mid,
5681         .revert_current_mid = smb2_revert_current_mid,
5682         .read_data_offset = smb2_read_data_offset,
5683         .read_data_length = smb2_read_data_length,
5684         .map_error = map_smb2_to_linux_error,
5685         .find_mid = smb2_find_mid,
5686         .check_message = smb2_check_message,
5687         .dump_detail = smb2_dump_detail,
5688         .clear_stats = smb2_clear_stats,
5689         .print_stats = smb2_print_stats,
5690         .dump_share_caps = smb2_dump_share_caps,
5691         .is_oplock_break = smb2_is_valid_oplock_break,
5692         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5693         .downgrade_oplock = smb3_downgrade_oplock,
5694         .need_neg = smb2_need_neg,
5695         .negotiate = smb2_negotiate,
5696         .negotiate_wsize = smb3_negotiate_wsize,
5697         .negotiate_rsize = smb3_negotiate_rsize,
5698         .sess_setup = SMB2_sess_setup,
5699         .logoff = SMB2_logoff,
5700         .tree_connect = SMB2_tcon,
5701         .tree_disconnect = SMB2_tdis,
5702         .qfs_tcon = smb3_qfs_tcon,
5703         .is_path_accessible = smb2_is_path_accessible,
5704         .can_echo = smb2_can_echo,
5705         .echo = SMB2_echo,
5706         .query_path_info = smb2_query_path_info,
5707         .query_reparse_tag = smb2_query_reparse_tag,
5708         .get_srv_inum = smb2_get_srv_inum,
5709         .query_file_info = smb2_query_file_info,
5710         .set_path_size = smb2_set_path_size,
5711         .set_file_size = smb2_set_file_size,
5712         .set_file_info = smb2_set_file_info,
5713         .set_compression = smb2_set_compression,
5714         .mkdir = smb2_mkdir,
5715         .mkdir_setinfo = smb2_mkdir_setinfo,
5716         .posix_mkdir = smb311_posix_mkdir,
5717         .rmdir = smb2_rmdir,
5718         .unlink = smb2_unlink,
5719         .rename = smb2_rename_path,
5720         .create_hardlink = smb2_create_hardlink,
5721         .query_symlink = smb2_query_symlink,
5722         .query_mf_symlink = smb3_query_mf_symlink,
5723         .create_mf_symlink = smb3_create_mf_symlink,
5724         .open = smb2_open_file,
5725         .set_fid = smb2_set_fid,
5726         .close = smb2_close_file,
5727         .close_getattr = smb2_close_getattr,
5728         .flush = smb2_flush_file,
5729         .async_readv = smb2_async_readv,
5730         .async_writev = smb2_async_writev,
5731         .sync_read = smb2_sync_read,
5732         .sync_write = smb2_sync_write,
5733         .query_dir_first = smb2_query_dir_first,
5734         .query_dir_next = smb2_query_dir_next,
5735         .close_dir = smb2_close_dir,
5736         .calc_smb_size = smb2_calc_size,
5737         .is_status_pending = smb2_is_status_pending,
5738         .is_session_expired = smb2_is_session_expired,
5739         .oplock_response = smb2_oplock_response,
5740         .queryfs = smb311_queryfs,
5741         .mand_lock = smb2_mand_lock,
5742         .mand_unlock_range = smb2_unlock_range,
5743         .push_mand_locks = smb2_push_mandatory_locks,
5744         .get_lease_key = smb2_get_lease_key,
5745         .set_lease_key = smb2_set_lease_key,
5746         .new_lease_key = smb2_new_lease_key,
5747         .generate_signingkey = generate_smb311signingkey,
5748         .calc_signature = smb3_calc_signature,
5749         .set_integrity  = smb3_set_integrity,
5750         .is_read_op = smb21_is_read_op,
5751         .set_oplock_level = smb3_set_oplock_level,
5752         .create_lease_buf = smb3_create_lease_buf,
5753         .parse_lease_buf = smb3_parse_lease_buf,
5754         .copychunk_range = smb2_copychunk_range,
5755         .duplicate_extents = smb2_duplicate_extents,
5756 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5757         .wp_retry_size = smb2_wp_retry_size,
5758         .dir_needs_close = smb2_dir_needs_close,
5759         .fallocate = smb3_fallocate,
5760         .enum_snapshots = smb3_enum_snapshots,
5761         .notify = smb3_notify,
5762         .init_transform_rq = smb3_init_transform_rq,
5763         .is_transform_hdr = smb3_is_transform_hdr,
5764         .receive_transform = smb3_receive_transform,
5765         .get_dfs_refer = smb2_get_dfs_refer,
5766         .select_sectype = smb2_select_sectype,
5767 #ifdef CONFIG_CIFS_XATTR
5768         .query_all_EAs = smb2_query_eas,
5769         .set_EA = smb2_set_ea,
5770 #endif /* CIFS_XATTR */
5771         .get_acl = get_smb2_acl,
5772         .get_acl_by_fid = get_smb2_acl_by_fid,
5773         .set_acl = set_smb2_acl,
5774         .next_header = smb2_next_header,
5775         .ioctl_query_info = smb2_ioctl_query_info,
5776         .make_node = smb2_make_node,
5777         .fiemap = smb3_fiemap,
5778         .llseek = smb3_llseek,
5779         .is_status_io_timeout = smb2_is_status_io_timeout,
5780         .is_network_name_deleted = smb2_is_network_name_deleted,
5781 };
5782
5783 struct smb_version_values smb20_values = {
5784         .version_string = SMB20_VERSION_STRING,
5785         .protocol_id = SMB20_PROT_ID,
5786         .req_capabilities = 0, /* MBZ */
5787         .large_lock_type = 0,
5788         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5789         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5790         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5791         .header_size = sizeof(struct smb2_sync_hdr),
5792         .header_preamble_size = 0,
5793         .max_header_size = MAX_SMB2_HDR_SIZE,
5794         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5795         .lock_cmd = SMB2_LOCK,
5796         .cap_unix = 0,
5797         .cap_nt_find = SMB2_NT_FIND,
5798         .cap_large_files = SMB2_LARGE_FILES,
5799         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5800         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5801         .create_lease_size = sizeof(struct create_lease),
5802 };
5803
5804 struct smb_version_values smb21_values = {
5805         .version_string = SMB21_VERSION_STRING,
5806         .protocol_id = SMB21_PROT_ID,
5807         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5808         .large_lock_type = 0,
5809         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5810         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5811         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5812         .header_size = sizeof(struct smb2_sync_hdr),
5813         .header_preamble_size = 0,
5814         .max_header_size = MAX_SMB2_HDR_SIZE,
5815         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5816         .lock_cmd = SMB2_LOCK,
5817         .cap_unix = 0,
5818         .cap_nt_find = SMB2_NT_FIND,
5819         .cap_large_files = SMB2_LARGE_FILES,
5820         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5821         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5822         .create_lease_size = sizeof(struct create_lease),
5823 };
5824
5825 struct smb_version_values smb3any_values = {
5826         .version_string = SMB3ANY_VERSION_STRING,
5827         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5828         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5829         .large_lock_type = 0,
5830         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5831         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5832         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5833         .header_size = sizeof(struct smb2_sync_hdr),
5834         .header_preamble_size = 0,
5835         .max_header_size = MAX_SMB2_HDR_SIZE,
5836         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5837         .lock_cmd = SMB2_LOCK,
5838         .cap_unix = 0,
5839         .cap_nt_find = SMB2_NT_FIND,
5840         .cap_large_files = SMB2_LARGE_FILES,
5841         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5842         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5843         .create_lease_size = sizeof(struct create_lease_v2),
5844 };
5845
5846 struct smb_version_values smbdefault_values = {
5847         .version_string = SMBDEFAULT_VERSION_STRING,
5848         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5849         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5850         .large_lock_type = 0,
5851         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5852         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5853         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5854         .header_size = sizeof(struct smb2_sync_hdr),
5855         .header_preamble_size = 0,
5856         .max_header_size = MAX_SMB2_HDR_SIZE,
5857         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5858         .lock_cmd = SMB2_LOCK,
5859         .cap_unix = 0,
5860         .cap_nt_find = SMB2_NT_FIND,
5861         .cap_large_files = SMB2_LARGE_FILES,
5862         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5863         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5864         .create_lease_size = sizeof(struct create_lease_v2),
5865 };
5866
5867 struct smb_version_values smb30_values = {
5868         .version_string = SMB30_VERSION_STRING,
5869         .protocol_id = SMB30_PROT_ID,
5870         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5871         .large_lock_type = 0,
5872         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5873         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5874         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5875         .header_size = sizeof(struct smb2_sync_hdr),
5876         .header_preamble_size = 0,
5877         .max_header_size = MAX_SMB2_HDR_SIZE,
5878         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5879         .lock_cmd = SMB2_LOCK,
5880         .cap_unix = 0,
5881         .cap_nt_find = SMB2_NT_FIND,
5882         .cap_large_files = SMB2_LARGE_FILES,
5883         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5884         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5885         .create_lease_size = sizeof(struct create_lease_v2),
5886 };
5887
5888 struct smb_version_values smb302_values = {
5889         .version_string = SMB302_VERSION_STRING,
5890         .protocol_id = SMB302_PROT_ID,
5891         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5892         .large_lock_type = 0,
5893         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5894         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5895         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5896         .header_size = sizeof(struct smb2_sync_hdr),
5897         .header_preamble_size = 0,
5898         .max_header_size = MAX_SMB2_HDR_SIZE,
5899         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5900         .lock_cmd = SMB2_LOCK,
5901         .cap_unix = 0,
5902         .cap_nt_find = SMB2_NT_FIND,
5903         .cap_large_files = SMB2_LARGE_FILES,
5904         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5905         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5906         .create_lease_size = sizeof(struct create_lease_v2),
5907 };
5908
5909 struct smb_version_values smb311_values = {
5910         .version_string = SMB311_VERSION_STRING,
5911         .protocol_id = SMB311_PROT_ID,
5912         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5913         .large_lock_type = 0,
5914         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5915         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5916         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5917         .header_size = sizeof(struct smb2_sync_hdr),
5918         .header_preamble_size = 0,
5919         .max_header_size = MAX_SMB2_HDR_SIZE,
5920         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5921         .lock_cmd = SMB2_LOCK,
5922         .cap_unix = 0,
5923         .cap_nt_find = SMB2_NT_FIND,
5924         .cap_large_files = SMB2_LARGE_FILES,
5925         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5926         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5927         .create_lease_size = sizeof(struct create_lease_v2),
5928 };